I have installed two Intensity Pro HDMI cards into my Mac Pro (MacPro5,1; 2 x 2.93 GHz Intel Xeon; OSX 10.6.6). The cards show up in my system profiler and indicate they are active and using the latest drivers, and the firmware was updated at installation. I am attempting to input video from two Panasonic HMC 150s; however I get only black (empty) screens and no audio. The input settings on the computer and the output settings on the camera match. It seems like acquiring the video signal would be straight-forward but so far no luck. Any suggestions?