Billy, I posted this in the HDV forum….I had a similar problem with FCP 5.1.4 and a Sony M25 HDV deck. What worked for me was to make sure HDV settings are in place with Sony firewire deck control…close Final Cut and start the HDV tape playing. Then re-open Final Cut with the HDV tape playing and I was able to get control when I re-opened capture mode.
Worth a shot …hope it works!
Best wishes, Charlie