Avermedia GameCapture HD problems

Hi I got an avermedia GameCapture HD to try and record some of my matches. I hooked up my xbox to the box, and the box to the TV, and plugged in an external drive throug the USB. Wires are correct and everything. However when I use it in Standard mode, there is no video or audio on the TV screen and pushing the menu button does nothing. But I can press the info button and the display saying standard mode appears. When I press the change mode button, in Real Time mode, there is video and sound on the TV, but pressing record does nothing. (no red light on the box indicating recording.)

Avermedia website is not helpful. Any thoughts or help would be highly appreciated. What am I doing wrong? Thanks!