Splack and SUN Sparc Ultra 5

Hello World!
I've a big problem with Spalck and the Workstation Sun Ultra 5 360MHZ(256 Mb)
I can't start KDE,i can't configure Xf86config ....i don't know why!

For eXample,the installation is OK...after the login i configure X-window with Xf86config.
The VGA onboard is ATI MACH64 with 4Mb ram,i hope so....but when i type the command "startX" there is this error:
"Can't load module for VGA CARD"
if i chancge the module of video card the problem is the same....


Can you help me?

I've the standard Sun Sparc Ultra 5 and i can't start KDE.....:-(