vga device does not exist

Hi! I just installed a SIS315 AGP card and Win98 does not detect it other than standard vga adapter which puts me in 640 x 480 mode. It seems like the hardware is not detected, even though I go have graphics. When I use try to use the driver loader I get the message noted in the subject line. Any thought? Thanks, Mike

have you tried adding it manually through add new hardware then selecting the product from the list or from the CDrom?