I just got a Mini DV tape back from being ranked and I can't get the video signal into my computer via my fire wire.

I can use the same camcorder to play back the tape and dub it to S-VHS or VHS via an S-VHS cable.

I can play pre existing tapes (both from Rank transfer and tapes made on this camera into this same computer and can dub them out via fire wire to this same DV CAMERA.

Teck stuff:

My camera is a Sony VX-1000 and the computer is an 400 Hz IMac with lots of RAM and hard drive space. The video program is Imovie which comes pre configured with the IMac.

This is the first time I've ever had a problem. Any ideas what and ware the problem could be?