So i figured out the problem. You guys have to go on blackmagics website and download the Desktop video 9.2 beta 3 if your on lion 10.7.3
Then make sure you have an hdmi cable plugged in the hdmi in slot going from your console to the bmie, and then have another hdmi plugged into the monitor/tv and that one plugged to into the bmie hdmi out. For the tb cables make sure to have the thunderbolt logo faced up not down. I made the mistake of having the tb cable faced down on the bmie and it didnt display on my MBP screen for the game i was recording.
Also make sure you plug in the extreme in first then start up media express after so that you can see the bmie in the device list. It also doesnt matter when you have your console turned because the extreme will detect it as long as you plugged in the extreme first.
That should fix your problem. Your welcome. Also if you want check my unboxing of the bmie on youtube just search up SubzeroFervor.