ATI TV-Wonder VE problem

Hi everybody. I'm using ATI TV-Wonder VE card.

I've hooked up the 1/8" jack to my line in, set the levels in the sound
control panel, and I don't get any sound. I shouldn't say that. I get
sound, but at a near-nil level and only when I turn my speakers to max.
All other sounds come out fine, and anything else I plug into my
line-in jack on the sound card comes out fine as well.

I don't know what to do. ATI's support has been less than helpful.
Somebody help, I'm at my wits' end.

Regards,
NRGY