Error when building level

[jeeves]

Hi,
When I select build all UE2 begins to build the level but during the process it closes down and a critical error appears saying the following:

No Label

OS: Windows XP 5.1 (Build:2600)
CPU: GenuineIntel Unknown Processor@ 2407MHz with 255MB RAM
Video: Mobility Radeon (6015)

General Protection Fault!

History: RenderLevel<-FLevelSceneNode::Render<-FPlayerSceneNode::Render<-UUnrealEdEngine:raw<-(Cam=U2Viewport0, Flags=850036425<-UWindowsViewport::Repaint<-UEditorEngine::RedrawLevel<-WEditorFrame::OnCommand<-WWindow::WndProc<-WWindow::StaticProc<-FFeddbackContextWindows::StatusUpdatef<-UEditorEngine::Exec_BSP<-UEditorEngine::Exec<-(BSP Rebuild)<-UUnrealEdEngine::Exec<-WPageOptions:uildBSP<-WPageOptions::OnBuildClick<-WEditorFrame::OnCommand<-WWindow::WndProc<-WWindow::StaticProc<-MessagePump<-MainLoop

Could someone please explain what these means or even help me solve this problem as its not allowing me to build my level and then play it. I am using UE2 on a laptop if that makes any difference.

Thanks