Critical Error

[FEELINGREEN]

cant start game client all time i get this shit:

2011.1.17 09:08:59
OS : Windows XP 5.1 (Build: 2600)
CPU : AuthenticAMD  AMD Athlon(tm) 64 X2 Dual Core Processor 3800+ @ 2452 MHz 1023MB RAM
Video : NVIDIA GeForce 7300 GT  (6099)
PosCode : LS8(83) 0:0:0 2/0 [417]

General protection fault!

History: UModel::PostLoad <- UObject::ConditionalPostLoad <- (Model Lobby01.Model5) <- PostLoadObjects <- UObject::EndLoad <- ULinkerLoad::CreateImport <- IndexToObject <- ULinkerLoad<<UObject <- (LinkerLoad Transient.LinkerLoad13 1409585)) <- FBspSurf<< <- TArray<< <- TTransArray<< <- UModel::Serialize <- LoadObject <- (Model Lobby01.Model5 1409585==1409585/5150467 1357242 1624311) <- ULinkerLoad::Preload <- ULevel::Serialize <- LoadObject <- (Level Lobby01.myLevel 1409585==1409585/5150467 880570 1387) <- ULinkerLoad::Preload <- PreLoadObjects <- UObject::EndLoad <- UObject::StaticLoadObject <- (Engine.Level None.MyLevel Lobby01) <- LoadLevel <- UGameEngine::LoadMap <- LocalMapURL <- UGameEngine::Browse <- UGameEngine::Init <- InitEngine

if anyone have any idea why i keep getting this error i would appriciate it alot

[Shabaka]

/maps/Lobby01.unr - crashed

[Pruusj]

2011.1.18 22:33:56
OS : Windows Vista 6.1 (Build: 7600)
CPU : GenuineIntel  Intel(R) Core(TM) i5 CPU         750  @ 2.67GHz @ 2665 MHz 4091MB RAM
Video : ATI Radeon HD 2900 XT  (1059)
PosCode : LS8(83) 0:0:0 4/0 [737]

Cast of ProxyBitmapMaterial Transient.ProxyBitmapMaterial27 to Combiner failed

History: AnalizeMaterial <- FD3DRenderInterface::SetL2ShaderMaterial <- FinalBlend Transient.FinalBlend22 <- FD3DRenderInterface::SetMaterial <- FBspDrawList::RenderWaterReflect <- RenderLevel::WaterLevel <- FWaterSheetSceneNode::Render <- RenderWaterSheet <- TranslucentRendering <- RenderLevel <- FLevelSceneNode::Render <- FPlayerSceneNode::Render <- ViewportLock1 <- Precaching <- UGameEngine::Draw <- UWindowsViewport::Repaint <- UWindowsClient::Tick <- ClientTick <- UGameEngine::Tick <- UpdateWorld <- MainLoop

Hey guys,
This is my error, someone knows what to do?
Thanx in advance

[Shabaka]

Turn off shaders in options