I just received my MKII shortboard and I am trying to set it up. I plugged it into my Spider 2 30 amp and the screen just says "FBV SB MKII." I can switch between my main patches but I cannot control the volume. If I press any button other than the A, B, C, or D buttons, it takes me back to the A patch. I have no idea how to fix this. I've tried "re-flashing" with Line 6 Monkey and that didn't help. When I plug it into my computer, it seems like it works as it is supposed to. I can select a patch, use the Stomp, Mod., Delay, and Reverb buttons without changing it back to patch A; and when I use the volume pedal, I can see the number on the screen go from 0-127. Also, the green LED lights up when plugged into my computer, but not the amp. And I've tried using different RJ-45 cables.

I've searched and can't find any thing like this, and I have read the manual.