Image? As in one frame, or video?
When I first bought and tried this software, I thought it might be my old VCR that was messing up, so I switched out that VCR for another one (not quite as old as the first one I'd connected), and then I got beautiful video. NO SOUND when previewing, NO SOUND when recorded. Still can't use it, coz there's no answer that's been provided.
For you, however, try adjusting the tracking on your VCR while you "preview" what you want to record. Have YOU got sound?