I have a bug with "monster summon" artifact

In a Invasion serveur,i unlocked "loaded monsters" then the game leave with that:

UT2004 Build UT2004_Build_[2005-11-23_16.22]

OS: Windows XP 5.1 (Build: 2600)
CPU: AuthenticAMD Unknown processor @ 2001 MHz with 2047MB RAM
Video: NVIDIA GeForce 8600 GT (6230)

General protection fault!

History: UObject::execClassContext <- (DruidMonsterMasterArtifactMonsterSummon DM-Super-Sexy's.DruidMonsterMasterArtifactMonsterSummon @ Function DruidsRPG200.DruidArtifactMonsterSummon.PostBeginPlay : 001A) <- UObject:

rocessEvent <- (DruidMonsterMasterArtifactMonsterSummon DM-Super-Sexy's.DruidMonsterMasterArtifactMonsterSummon, Function DruidsRPG200.DruidArtifactMonsterSummon.PostBeginPlay) <- ULevel::SpawnActor <- (DruidMonsterMasterArtifactMonsterSummon) <- UObject::execClassContext <- (RPGStatsInv DM-Super-Sexy's.RPGStatsInv @ Function UT2004RPG.RPGStatsInv.Tick : 00BA) <- UObject:

rocessEvent <- (RPGStatsInv DM-Super-Sexy's.RPGStatsInv, Function UT2004RPG.RPGStatsInv.Tick) <- AActor::Tick <- TickAllActors <- ULevel::Tick <- (NetMode=3) <- TickLevel <- UGameEngine::Tick <- Level DM-(ReZ)-@@'s <- UpdateWorld <- MainLoop <- FMallocWindows::Free <- FMallocWindows::Realloc <- 10910191 0 FArray <- FArray::Realloc <- 0*2 <- FMallocWindows::Free

I don't know where is the problem ,can you help me please?(i have download druid files)

See this thread.
Probably incompatible version of UT2004RPG.

Ah i understand

thanks