Minecarft Crashed! VERY IMPORTANT!!!!!

Hello, i just got a mod called Portal Gun Mod and when i play Minecraft it is fine until i press E to open my inventory. Then it exits my world and 3 seconds later it says this:
Minecraft has crashed!
----------------------

Minecraft has stopped running because it encountered a problem; Unexpected error

A full error report has been saved to C:\Users\Jack\AppData\Roaming\.minecraft\crash-reports\crash-2013-03-09_14.36.36-client.txt - Please include a copy of that file (Not this screen!) if you report this crash to anyone; without it, they will not be able to help fix the crash



--- BEGIN ERROR REPORT b88099d7 --------
Full report at:
C:\Users\Jack\AppData\Roaming\.minecraft\crash-reports\crash-2013-03-09_14.36.36-client.txt
Please show that file to Mojang, NOT just this screen!

Generated 9/03/13 2:36 PM

-- Affected level --
Details:
Level name: MpServer
All players: 1 total; [ays['6340'/305, l='MpServer', x=-25.79, y=69.62, z=110.65]]
Chunk stats: MultiplayerChunkCache: 441
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (52,64,252), Chunk: (at 4,4,12 in 3,15; contains blocks 48,0,240 to 63,255,255), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Level time: 15337 game time, 15337 day time
Level dimension: 0
Level storage version: 0x00000 - Unknown?
Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: false
Forced entities: 75 total; [qn['Skeleton'/141, l='MpServer', x=29.50, y=65.00, z=94.28], ow['Bat'/143, l='MpServer', x=19.41, y=17.60, z=124.97], qr['Zombie'/142, l='MpServer', x=28.50, y=13.00, z=114.50], qn['Skeleton'/129, l='MpServer', x=10.53, y=47.00, z=162.02], ow['Bat'/128, l='MpServer', x=13.88, y=55.57, z=160.56], ow['Bat'/131, l='MpServer', x=12.84, y=56.10, z=160.44], oy['Chicken'/130, l='MpServer', x=5.78, y=62.30, z=173.81], ow['Bat'/153, l='MpServer', x=39.88, y=54.10, z=70.63], qr['Zombie'/154, l='MpServer', x=46.50, y=66.00, z=101.50], qn['Skeleton'/155, l='MpServer', x=40.50, y=66.00, z=112.50], ow['Bat'/156, l='MpServer', x=48.38, y=40.89, z=125.69], ow['Bat'/157, l='MpServer', x=43.25, y=56.79, z=134.63], qr['Zombie'/158, l='MpServer', x=47.66, y=69.00, z=131.00], qn['Skeleton'/159, l='MpServer', x=42.50, y=21.00, z=156.50], ow['Bat'/144, l='MpServer', x=28.50, y=12.60, z=115.97], ow['Bat'/145, l='MpServer', x=17.78, y=46.73, z=147.44], qn['Skeleton'/146, l='MpServer', x=23.31, y=55.00, z=154.47], qp['Spider'/147, l='MpServer', x=23.59, y=38.00, z=163.91], qd['Enderman'/31, l='MpServer', x=-100.41, y=64.00, z=70.59], oz['Cow'/33, l='MpServer', x=-105.75, y=64.00, z=132.06], qp['Spider'/36, l='MpServer', x=-100.06, y=67.00, z=161.13], qk['Zombie Pigman'/433, l='MpServer', x=-28.79, y=68.00, z=110.30], qr['Zombie'/160, l='MpServer', x=33.50, y=69.00, z=162.50], qn['Skeleton'/47, l='MpServer', x=-93.16, y=63.00, z=108.28], ow['Bat'/165, l='MpServer', x=48.38, y=39.33, z=126.63], qn['Skeleton'/164, l='MpServer', x=51.50, y=67.00, z=111.50], qc['Creeper'/51, l='MpServer', x=-81.16, y=68.00, z=177.56], oz['Cow'/50, l='MpServer', x=-81.59, y=70.00, z=184.38], qp['Spider'/49, l='MpServer', x=-82.47, y=64.00, z=149.22], qp['Spider'/48, l='MpServer', x=-97.75, y=64.00, z=140.91], qr['Zombie'/59, l='MpServer', x=-59.69, y=73.00, z=150.90], oz['Cow'/62, l='MpServer', x=-73.41, y=70.00, z=178.38], oz['Cow'/61, l='MpServer', x=-76.34, y=67.00, z=187.47], qn['Skeleton'/60, l='MpServer', x=-68.69, y=71.00, z=160.00], ph['Squid'/69, l='MpServer', x=-48.50, y=60.38, z=68.50], qr['Zombie'/341, l='MpServer', x=5.53, y=24.00, z=47.16], qp['Spider'/70, l='MpServer', x=-51.66, y=64.00, z=81.97], qc['Creeper'/340, l='MpServer', x=6.47, y=15.00, z=51.00], qn['Skeleton'/71, l='MpServer', x=-62.47, y=66.00, z=121.95], ays['6340'/305, l='MpServer', x=-25.79, y=69.62, z=110.65], qp['Spider'/337, l='MpServer', x=-3.47, y=63.00, z=42.59], oz['Cow'/76, l='MpServer', x=-43.50, y=68.00, z=173.44], oz['Cow'/77, l='MpServer', x=-70.38, y=67.00, z=186.69], ph['Squid'/79, l='MpServer', x=-50.03, y=60.97, z=68.50], qn['Skeleton'/347, l='MpServer', x=34.78, y=64.00, z=45.16], qn['Skeleton'/72, l='MpServer', x=-43.99, y=68.00, z=124.56], qc['Creeper'/73, l='MpServer', x=-56.50, y=68.00, z=124.50], oz['Cow'/74, l='MpServer', x=-55.06, y=73.00, z=153.16], qc['Creeper'/75, l='MpServer', x=-63.50, y=73.00, z=161.50], ph['Squid'/85, l='MpServer', x=-32.50, y=58.13, z=170.06], ph['Squid'/84, l='MpServer', x=-30.13, y=59.19, z=168.16], qn['Skeleton'/324, l='MpServer', x=-85.13, y=63.00, z=36.50], oz['Cow'/87, l='MpServer', x=-46.56, y=66.00, z=184.47], qn['Skeleton'/325, l='MpServer', x=-67.50, y=63.00, z=40.50], ow['Bat'/81, l='MpServer', x=-39.50, y=21.70, z=131.25], EntityWeepingAngel['Weeping Angel'/80, l='MpServer', x=-41.50, y=64.00, z=88.50], qr['Zombie'/83, l='MpServer', x=-40.75, y=70.00, z=133.41], qr['Zombie'/82, l='MpServer', x=-44.50, y=72.00, z=142.50], qn['Skeleton'/335, l='MpServer', x=-7.50, y=28.00, z=35.50], qn['Skeleton'/89, l='MpServer', x=-19.50, y=12.00, z=67.50], ph['Squid'/91, l='MpServer', x=-29.53, y=58.97, z=170.72], ph['Squid'/90, l='MpServer', x=-25.50, y=61.38, z=170.50], qn['Skeleton'/104, l='MpServer', x=-8.50, y=68.00, z=143.50], qr['Zombie'/119, l='MpServer', x=8.57, y=19.00, z=56.83], qr['Zombie'/118, l='MpServer', x=9.50, y=18.04, z=57.33], qc['Creeper'/117, l='MpServer', x=8.53, y=16.00, z=53.03], qn['Skeleton'/116, l='MpServer', x=14.50, y=24.00, z=61.50], ow['Bat'/127, l='MpServer', x=17.16, y=58.89, z=154.13], ow['Bat'/126, l='MpServer', x=11.78, y=28.42, z=149.66], ow['Bat'/125, l='MpServer', x=12.05, y=25.50, z=155.75], ow['Bat'/124, l='MpServer', x=11.72, y=55.39, z=139.47], qc['Creeper'/123, l='MpServer', x=10.25, y=38.00, z=133.91], qp['Spider'/122, l='MpServer', x=8.38, y=67.00, z=96.72], EntityWeepingAngel['Weeping Angel'/121, l='MpServer', x=10.34, y=66.00, z=95.56], qc['Creeper'/120, l='MpServer', x=6.50, y=68.00, z=79.50]]
Retry entities: 0 total; []
Stacktrace:
at ayp.a(WorldClient.java:440)
at net.minecraft.client.Minecraft.b(Minecraft.java:2401)
at net.minecraft.client.Minecraft.run(Minecraft.java:794)
at java.lang.Thread.run(Unknown Source)

-- System Details --
Details:
Minecraft Version: 1.4.7
Operating System: Windows 7 (x86) version 6.1
Java Version: 1.7.0_15, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
Memory: 333038912 bytes (317 MB) / 519110656 bytes (495 MB) up to 1037959168 bytes (989 MB)
JVM Flags: 2 total; -Xms512m -Xmx1024m
AABB Pool Size: 5955 (333480 bytes; 0 MB) allocated, 3 (168 bytes; 0 MB) used
Suspicious classes: FML and Forge are installed
IntCache: cache: 0, tcache: 0, allocated: 3, tallocated: 63
FML: MCP v7.26 FML v4.7.4.520 Minecraft Forge 6.6.0.497 8 mods loaded, 8 mods active
mcp [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
FML [Forge Mod Loader] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
Forge [Minecraft Forge] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
mod_sucker [mod_sucker] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
WeepingAngelsMod [Weeping Angels Mod] (146-157WeepingAngels.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
DalekMod [DalekMod] (Dalek Mod 1.4.7 - Forge.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
PortalGun [Portal Gun] (PortalGun1.4.7v2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
colossali_SlenderMan [SlenderMan] (SlenderMan2.1.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available
LWJGL: 2.4.2
OpenGL: GeForce 9300M GS/PCI/SSE2 GL version 3.0.0, NVIDIA Corporation
Is Modded: Definitely; Client brand changed to 'forge,fml'
Type: Client (map_client.txt)
Texture Pack: 147-158WeepingAngels.zip
Profiler Position: N/A (disabled)
Vec3 Pool Size: 1957 (109592 bytes; 0 MB) allocated, 17 (952 bytes; 0 MB) used

java.lang.NoClassDefFoundError: aux
at net.minecraft.client.Minecraft.l(Minecraft.java:1753)
at net.minecraft.client.Minecraft.J(Minecraft.java:846)
at net.minecraft.client.Minecraft.run(Minecraft.java:771)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: aux
at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:185)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 4 more
Caused by: java.lang.NullPointerException
at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:174)
... 6 more
--- END ERROR REPORT 82cd30ef ----------

Waht do i do. this is important!