I have a Sony digital camcorder that connects fine with my PC desktop. I tried using iMovie and the iBook for the first time but iMovie would not detect the firewire that is attached to the camcorder. I have the camcorder set to VTR (play mode). Turned on iMovie and clicked on the Camcorder icon next to the scissor icon on iMovie. I checked the Help but didn't help. What should I check next. The camera is a Sony DCR-TRV520.