I had my slingbox working perfectly until I bought a new router, and had to set it all up again. Now I cannot get the on-screen remote to work. Of course the volume & mute buttons work, but they appear to be unrelated. If I go to the guide, I can tune to a channel. So, I assume I've picked the right remote, and the IR blaster is working properly. Why can I not do this with the on screen remote? I also find it weird that the volume &/or mute buttons are highlighted when I hover over them, but all the other buttons appear as though they are greyed out. Please help!