I have the PYRO A/V Link converter box. It is recognized in the system Profiler. The cables are hooked up as per instructions in the manual. When I start iMovie, I get a blue screen (in iMovie) and it says "no camera attached".The dip switches on the box are set to the Mac settings. I'm using a MacMini. My analog camera is an RCA. I would really appreciate any help you can give me.