I need some help with this one - I've got the Monoprice Mini-display port to HDMI adapter hooked up to TV's HDMI port, but all I get is a beautiful HD image of my desktop (no icons visible). If I go into Front Row or to a website (like Hulu), all I get is a blank screen. I've tried different TV's and different HDMI cables (even a different adapter!), but still get the same result. Ideas????