Do you in fact have a S-VHS VCR?

Scart plugs/cables are "universal" animals -  ie - they will have the S-video connections present and usable even though your VCR is unable to output S-video signals.

I would suggest you try the composite video RCA connection and select in Studio the same while capturing (assuming you have already selected the correct color system ie PAL/NTSC and have also ticked th "VHS recording" box in the recording settings)