Analog video capture

[Guest]

Connected a VCR via composit connectors to ATI AIW7500 using WinXP Movie Maker 2. I can see the video and hear audio but more than half the time I click Start Capture I get a file which has no video and only audio. Sometimes if I start a new capture collection it works and other times it freezes at 3kB total and not video. Have managed to capture an entire VHS tape once. Now I'm tweaking the brightness levels and cant get the software to grab video
Any thoughts
Thanks.

 

[Guest]

Have not found out that the first time I attempt a capture it will not grab video...only audio. If I cance
and restart the capture process it works fine. Every other time it will only grab audio. I simply stop capture
cancel the collection and restart a new collection and it works fine.