flashing and redrawing issues with NVidia Quadro FX 4600

Hi all, I have a software program that has issues: flashes the primary monitor & opengl display portion redraws incorrectly when you resize the display portion. I have a dual monitor setup and these issues weren’t present on the Quadro FX 4500. Is there something that i need to change in my code or a video driver setting that i need to change. I have the last driver for the card for windows xp.
Thanks in advance,