I am able to transfer Digital8 tapes from my Sony DCR-TRV520E PAL video camera over a firewire cable to my no-name 1394 card, using "Ulead Videostudio 11 SE" to write the video to a .avi file.

The video camera can also play older analog tapes - and outputs a digital video stream on the 1394 port. But when I try to capture this stream with "Ulead Videostudio 11 SE", it fails after a few seconds with the message:
Capturing failed
The file created is corrupted and unusable.
It will be automatically deleted.

Has anyone ever experienced this before, and how do I solve it?