[plug] Error running ut

[Richard]

We have just got UT (Unreal Tournament) for Linux and it installs and runs 
fine on my box but we are getting errors on my brothers when he tries to run 
it. Both are Mandrake8.2, his is Pakard Bell 720a monitor and Leadtek 
Geforce2 ti card. The error is...

xlib: extension "GLX" missing on display ":0.0".
appError called:
couldn't set video mode: couldn't find matching GLX visual

...he is running the latest nvidea drivers and all else seems to be ok. Any 
hints would save a lot of hair pulling :) Thanks.
Richard