camcorder not recognized by computer

My HP 734n computer with XP Home Edition won't recognize
my Sony TRV-730 Digital 8 camcorder. I've tried all the
usual and a few unusual things to fix the problem. Any
ideas?????? THANKS P.S. The computer does recognize the
still camera side of the camcorder, but NOT the video
side. The video side connects via firewire. When I
connect it absolutely nothing happens and when I go into
Add New Hardware I get a screen that says Tape Controller
driver cannot be installed.