^^^ Yeah OK, I'll try it all on a tv. The HDMI to DVI conversion works perfectly when the capture card is not used however.
From memory I plugged it all in while the software was installing but the instructions didn't say otherwise (i.e. there was no order stipulated). Should I have installed the software after plugging in all the cables, etc? If so, should I un-install everything and start again?
Thankyou both for your help.