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ok so i try to join a server and my minecraft crashes right away. I have played on it before but now i have this problem. Any solutions?? here is my crash report. Time: 6/14/12 11:48 AM Description: Exception in server tick loop aqp: Failed to check session lock, aborting at gg.b(SourceFile:69) at adb.s(SourceFile:2141) at aqk.a(SourceFile:84) at ait.b(SourceFile:127) at ait.a(SourceFile:151) at adi.a(SourceFile:496) at pn.h(SourceFile:220) at arf.n(SourceFile:100) at pn.run(SourceFile:283) at do.run(SourceFile:452) Relevant Details: - Minecraft Version: 12w23b - Operating System: Mac OS X (x86_64) version 10.7.4 - Java Version: 1.6.0_31, Apple Inc. - Java VM Version: Java HotSpot 64-Bit Server VM (mixed mode), Apple Inc. - Memory: 259845664 bytes (247 MB) / 581435392 bytes (554 MB) up to 1065025536 bytes (1015 MB) - Player Count: 1 / 0; [gb['npsoccer15'/302200, l='New World----------', x=-148.67, y=69.25, z=1.42]] - World New World---------- Entities: 0 total; [] - World New World---------- Players: 0 total; [] - World New World---------- Chunk Stats: ServerChunkCache: 0 Drop: 0

ok so when i try to join a server that i hav employed on before my tekkit just crashes. here is my chrash report. Time: 6/14/12 11:48 AM Description: Exception in server tick loop aqp: Failed to check session lock, aborting at gg.b(SourceFile:69) at adb.s(SourceFile:2141) at aqk.a(SourceFile:84) at ait.b(SourceFile:127) at ait.a(SourceFile:151) at adi.a(SourceFile:496) at pn.h(SourceFile:220) at arf.n(SourceFile:100) at pn.run(SourceFile:283) at do.run(SourceFile:452) Relevant Details: - Minecraft Version: 12w23b - Operating System: Mac OS X (x86_64) version 10.7.4 - Java Version: 1.6.0_31, Apple Inc. - Java VM Version: Java HotSpot 64-Bit Server VM (mixed mode), Apple Inc. - Memory: 259845664 bytes (247 MB) / 581435392 bytes (554 MB) up to 1065025536 bytes (1015 MB) - Player Count: 1 / 0; [gb['npsoccer15'/302200, l='New World----------', x=-148.67, y=69.25, z=1.42]] - World New World---------- Entities: 0 total; [] - World New World---------- Players: 0 total; [] - World New World---------- Chunk Stats: ServerChunkCache: 0 Drop: 0