I use the same card Leadtek TV 2000 Expert.
I just started using MovieFactory to capture with, and I'll tell you why.
At first I used the the Winfast PVR software. I used a default setting that implied dvd compliant format, but that was not. So I struggled as a newbie until I learned more.
Alan, please supply more information to allow us to help you.
Machine specs, other programs running in the background,
what settings in MF you are using for the capture, etc.
Here the link to the ULEAD site with faqs
http://www.ulead.com/learning/learning.htm
Locate the latest patches there too....optimize your machine, apply the patches and try a 2 minute or so short capture. In my experience, a little after capturing is normal, then I click on the back button and go back and look at my capture and trim anything out I want to.
Get those patches installed ASAP - it made a huge difference for me.
Good luck!