In xandros when I want to play UT I keep getting this error

Code:
Couldn't run Unreal Tournament (ut-bin). Is UT_DATA_PATH set?
I can play it if I go into /usr/local/games/ut/ and run ut from there but the game get kinda choppy ??? ??? and my fps (glxgears) is much much higher in xandros then it was in fedora

TIA
Michael