Pinnacle Studio 10 & S-video

I am trying to copy(capture) a VCR tape using Studio 10 QuickStart.

It works using RCA cables but I want to use an S-video cable to see if the transfer would be less fuzzy.

I only get audio, no pic when I use the S-video cable.

There is a "Video input" setting for "Composite" or "S-Video" in Studio 10 which I have used. Works on "Composite" but not "S-video".

Any ideas?