Quake 3 GL Problem!

Q-3 worked well w/Voodoo 3. Installed Guilleot Prophet II GTS Pro AGP 64MB RAM. Q-3 now stalls on loading OPEN-GL with “User Interface Problem: Found Type 4; Expected Type 3” message. Intel P-III 600 MHz 128MB RAM.

HELP!! What can I do to fix this??
:frowning: