the viewing program cant "detect" it cuz the driver aint workin properly or not installed , not cuz the pc/windows cant detect it.. naturally it does but without the driver workin properly/installed its not so *usable*..
did it work before with that viewing program? might wanna try dscaler http://www.dscaler.org/
are you 100% sure you used the right driver? (maybe you used a driver for a diffrent card with a similar model)