My minecrafts Mod pack crashed please tell me why














---- Minecraft Crash Report ----
// Hi. I'm Minecraft, and I'm a crashaholic.

Time: 10/24/14 5:33 PM
Description: Exception in server tick loop

java.lang.NullPointerException
at net.minecraft.world.chunk.Chunk.func_76592_a(Chunk.java:758)
at net.minecraft.world.World.func_72832_d(World.java:559)
at net.minecraft.world.gen.feature.WorldGenMinable.func_76484_a(WorldGenMinable.java:82)
at securitycraft.SecurityCraftWorldGen.generateSurface(SecurityCraftWorldGen.java:31)
at securitycraft.SecurityCraftWorldGen.generate(SecurityCraftWorldGen.java:17)
at cpw.mods.fml.common.registry.GameRegistry.generateWorld(GameRegistry.java:103)
at net.minecraft.world.gen.ChunkProviderServer.func_73153_a(ChunkProviderServer.java:259)
at net.minecraft.world.chunk.Chunk.func_76624_a(Chunk.java:1253)
at net.minecraft.world.gen.ChunkProviderServer.func_73158_c(ChunkProviderServer.java:153)
at net.minecraft.server.MinecraftServer.func_71222_d(MinecraftServer.java:294)
at net.minecraft.server.integrated.IntegratedServer.func_71247_a(IntegratedServer.java:90)
at net.minecraft.server.integrated.IntegratedServer.func_71197_b(IntegratedServer.java:107)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:445)
at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:583)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- System Details --
Details:
Minecraft Version: 1.6.4
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.7.0_67, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 128949656 bytes (122 MB) / 258314240 bytes (246 MB) up to 1060372480 bytes (1011 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Suspicious classes: FML and Forge are installed
IntCache: cache: 10, tcache: 0, allocated: 3, tallocated: 63
FML: MCP v8.11 FML v6.4.45.953 Minecraft Forge 9.11.1.953 18 mods loaded, 18 mods active
mcp{8.09} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
FML{6.4.45.953} [Forge Mod Loader] (minecraftforge-9.11.1.953.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
Forge{9.11.1.953} [Minecraft Forge] (minecraftforge-9.11.1.953.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
CodeChickenCore{0.9.0.9} [CodeChicken Core] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
NotEnoughItems{1.6.1.9} [Not Enough Items] (NotEnoughItems-1.6.4-1.6.1.9-universal.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
derpysquid{2.8.0} [The Derpy Squid Mod] (1.6.4 DerpySquid Latest.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
FDM{1.6.4} [[Fizzy drinks mod]] ([Fizzy Drinks mod] v.5.4.0 [MC 1.6.4][English].zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
FDMClient{1.6.4} [Fizzy drinks mod [Achievments]] ([Fizzy Drinks mod] v.5.4.0 [MC 1.6.4][English].zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
DemApple{V1.5 For MC 1.6.4} [Dem Apples+] ([Forge] Dem Apples+ V1.5 For MC 1.6.4.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
bbCraft{0.12} [bbCraft] (bbCraft_V0.12.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
fuelresourceful{1.1 Beta} [Fuel-Resourceful] (Fuel-Resourceful 1.1 Beta for 1.6.4.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
Gecko{0.0.6} [Gecko] (gecko-006-c.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
mobfusion{0.0.0} [Mob Fusion] (mobfusion7970233.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
blocks{NONE} [Enderpearl Mod Sub-Class] (More Enderpearls Mod v1.8[1.6.4].jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
slenderpearl{????} [More Enderpearls Mod] (More Enderpearls Mod v1.8[1.6.4].jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
securitycraftbase{5.1} [Security Craft] (Security Craft-5.1.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
Romejanic.TF2Stranges{1.1} [§6TF2 Stranges] (TF2Stranges_11_164.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
Turtle{1.3} [Turtle Mod] (turtlemod13.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available
Profiler Position: N/A (disabled)
Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Player Count: 0 / 8; []
Type: Integrated Server (map_client.txt)
Is Modded: Definitely; Client brand changed to 'fml,forge'