Check if you have the latest drivers for your computer (mobo,video cards, sound card). Check also if you have all the latest updates for your Windows OS.

You may also want to resintall DirectX as this hsould be done whenever you change video cards. Also, you did uninstall your previous video card drivers BEFORE installing your TI4600 drivers right? If not, you will have major problems. Any time you change a video card, you should set your card type in Windows to Standard VGA adaptor, reboot and then uninstall the drivers for the old card. Then you shutdown, remove old and install new card and when prompted, install the drivers for your new video card. Did you do this?

i did all of this before posting the first message but have found out that all daul mode video cards wont run correctly under win98 and i have now put xp pro on my machine thanx for all the help xp sorted out the problems