Thanks for your reply Marc.

The avi file that I used was rendered as PAL DV Widescreen in Vegas Pro8 and the details were:

Audio: 48,000 Hz, 16 Bit, Stereo, PCM Uncompressed.
Video: 25 fps, 720x576, Lower field first.
Pixel Aspect Ratio: 1.457. OpenDML compatible.
Widescreen PAL DV video files compatible with Sony Video Capture.

As a first step to fixing the problem is this ok?

Colin