On Kashyyyk my computer crashes

[KotSte]

Hello there,

 

at first my system:

 

MoBo: GA-7S748-L

CPU: Athlon XP 3000+

RAM: 1024 MB PC3200 Corsair (2x 512 MB ValueSelect)

Video: MSI-NX6800-LE

Sound: CL Audigy LS

 

Windows XP Pro

 

Everything is fine playing SW BF. I can see the sky also. But when I run the first campaing and fighting on Kashyyyk my system crashes. Sound freezes and monitor goes to black/off. There is no signal it says...

 

Can anyone help or has the same problem, perhaps on a other map? Pls, let me know what to do to solve.

 

So long, Steffen