well i normaly started my server but not on the normal world so i restarted it and this is what it's says:
can some on please help my my server is on hamchi
---- Minecraft Crash Report ----
// Shall we play a game?

Time: 9-10-12 20:10
Description: Exception in server tick loop

java.lang.RuntimeException: Failed to check session lock, aborting
at aeb.h(SourceFile:49)
at aeb.<init>(SourceFile:35)
at adx.<init>(SourceFile:16)
at ady.a(SourceFile:78)
at net.minecraft.server.MinecraftServer.a(SourceFile:147)
at ft.b(SourceFile:153)
at net.minecraft.server.MinecraftServer.run(SourceFile:291)
at ep.run(SourceFile:539)

Relevant Details:
- Minecraft Version: 1.3.2
- Operating System: Windows 7 (x86) version 6.1
- Java Version: 1.7.0_05, Oracle Corporation
- Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
- Memory: 500034256 bytes (476 MB) / 519110656 bytes (495 MB) up to 1037959168 bytes (989 MB)
- JVM Flags: 2 total; -Xms512m -Xmx1024m
- Is Modded: Unknown (can't tell)
- Profiler Position: N/A (disabled)
- Player Count: 0 / 30; []
- Type: Dedicated Server