No video from BD player

[danielplainview]

Hi - I have what I fear is a fairly odd problem.

I'm living in the US but I brought over my UK Sony BDP-s360.

since I don't have an HDTV here I'm making a compromise by trying to hook it up to an old SD projector using the phono leads - ( I think that's what they're called - the red, white and yellow cables ). However whilst I get sound I'm getting no picture - is this because the signal my UK Blu Ray player is putting out is not compatible with the US projector? (It's a Sharp XR-10X)

Thanks!