gaming with digital projector

am attempting to use my sony digital projector for gaming purposes. have attempted to load MOHAA with digital projector attached to 9-pin monitor output on an ATI 9700 Pro card and am told that the computer is “unable to access opengl drivers.” when desktop monitor is returned, all works well, so problem seems to be with the use of my digital projector. any advice?

actually, this problem seems to be a derivative of the “cannot load opengl subsystem” problem in previous posts, since that is the actual error message i get when i try to fire up MOHAA with my digital projector attached. the twist is that everything works fine with my desktop monitor (sony trinitron). any advice would be greatly appreciated.