Any help would be appreciated!

Purchased Avermedia Ultra TV PCI 300 card due to the fact that this card is listed as compatible on the Nero 6 ultra website. When I play 8mm camcorder there is no sound! Even captured, but no sound. There is sound when using Avermedia Softwares for TV controller and the NEODVD ( Not Nero) . The sound does work for other applications in the Nero software, such as cd, and dvd playing and other video that i captured by other ways. Volume controls all seem ok and cables OK.
I would rather use Nero 6 to capture because the video and audio seem to be much better than NEOdvd software, and editing is better. You might ask, how do I know that audio sounds better? Well I tried another capture card that was not listed as supported on Nero website. Picture and sound was great, but video stopped working after 8 minutes, each time, I tried it,so I got rid of that card . Also used an external usb capture device. That produced a yellow color in background!! This has been a nerve killing expeirence!!

Thanks for any help, Larry K