I just bought a Sirius and Isimple for my truck so I can see and control the sat radio from my factory head unit on my 2005 F-150 with the AUX button. When a scroll through the menu and select "SAT CAT" and press 6 the category shows up on the screen, but it won't let me scroll through the categories. Also when I try to change the channel manually, it won't go past the current cat.

Am I doing something wrong?
Thanks,
Matt