L2 CavaData game error

Hello, im trying to play L2 CavaData but everytime i start l2 it crashes and gives me the following error message:

2012.4.7 00:49:57

OS : Windows7(32) 6.1 (Build: 7600)

CPU : AuthenticAMD  AMD Athlon 64 X2 Dual Core Processor 3600+ @ 2012 MHz 2047MB RAM

Video : NVIDIA GeForce 7900 GS (9573)

PosCode : LS1(268) 0:0:0 2/0 [591]

Assertion failed: GIsDynamicRecompile || GIsEditor || GetSuperClass() || this==UObject::StaticClass() [File:.\UnClass.cpp] [Line: 910]

History: UClass::Bind <- (Class Aden_broken_Castle_T.Aden_BC_ach) <- ULinkerLoad::CreateExport <- (Aden_BC_ach 2643986) <- ULinkerLoad::Create <- UObject::StaticLoadObject <- (Engine.Texture Aden_broken_Castle_T.Aden_BC_ach NULL) <- UOrcMove::CalculateCRC32 <- 1.510000::0 <- UGameEngine::Init <- InitEngine

I used the fresh h5 client and system they provided with the same result. I would appreciate that somebody would give me a solution to my problem. Thx in advance!