This didnt really belong in the Experts forum, so I moved it here.
I have a feeling you may be using the wrong Linux distribution. Playing games was not what BackTrack was designed for.
And out of a perverse sense of curiosity I just tried installing pokerth (Texas Holdem - my chosen form of poker) and kpoker-kde3 on BackTrack 4 Final and both work fine. Try one of those, or maybe try a distribution more suited to general use/game playing like Ubuntu.