Help please with this crash

[Manx]

Revision: * * 9435 *

Date 23:2:2010. Time 20:6

//=====================================================

*** Hardware ***

Processor: Intel® Core i7 CPU 920 @ 2.67GHz

Number Of Processors: 8

Physical Memory: 4194303 KB (Available: 4194303 KB)

Commit Charge Limit: 4194303 KB

*** Operation System ***

Windows Vista or Windows Server 2008 Server 4.0 (Version 6.1, Build 7600)

//=====================================================

Exception code: C0000005 ACCESS_VIOLATION

Fault address: 0081F3DB 01:0041E3DB C:\\Server wow\\mangosd.exe

Registers:

EAX:72616863

EBX:F33BBEE8

ECX:72616863

EDX:00000000

ESI:00000000

EDI:008A0720

CS:EIP:0023:0081F3DB

SS:ESP:002B:0B2CCA00 EBP:0B2CFAE4

DS:002B ES:002B FS:0053 GS:002B

Flags:00010246

Call stack:

Address Frame Function SourceFile

0081F3DB 00000000 WorldSession::HandleSetActiveMoverOpcode+12B

00604760 00000000 WorldSession::Update+120

006145E3 00000000 World::UpdateSessions+C3

00612E75 00000000 World::Update+365

00430A5E 00000000 WorldRunnable::run+8E

008A0739 00000000 ACE_Based::Thread::ThreadTask+19

73CA1B84 00000000 ?invoke@ACE_OS_Thread_Adapter@@UAEKXZ+74

74783433 00000000 _endthreadex+44

747834C7 00000000 _en

========================

Local Variables And Parameters

Call stack:

Address Frame Function SourceFile

0081F3DB 00000000 WorldSession::HandleSetActiveMoverOpcode+12B

Local <user defined> 'this'

Local <user defined> 'recv_data'

punting on symbol guid

00604760 00000000 WorldSession::Update+120

Local <user defined> 'opHandle'

Local <user defined> 'this'

punting on symbol __formal

Local <user defined> 'packet'

punting on symbol currTime

006145E3 00000000 World::UpdateSessions+C3

Local <user defined> 'next'

Local <user defined> 'itr'

Local <user defined> 'this'

punting on symbol diff

Local <user defined> 'sess'

00612E75 00000000 World::Update+365

punting on symbol i

Local <user defined> 'this'

punting on symbol diff

00430A5E 00000000 WorldRunnable::run+8E

punting on symbol diff

Local <user defined> 'this'

punting on symbol realCurrTime

punting on symbol realPrevTime

punting on symbol prevSleepTime

008A0739 00000000 ACE_Based::Thread::ThreadTask+19

punting on symbol param

Local <user defined> '_task'

73CA1B84 00000000 ?invoke@ACE_OS_Thread_Adapter@@UAEKXZ+74

74783433 00000000 _endthreadex+44

I have no idea how to avoid this crash.

Help me please