Hang on in there if you can.
I had a lot of trouble getting my Mediator etc all working, but when it does, its worth all the hassle. As stated, connections are a common issue. In my situation I pay a certain amount of attention to the chips on the Mediator itself as well as where it interfaces with the 1200 and accelerator. I take the lid off my tower, get plenty of light in the room, power off, have a little tweak/push on a connection, power on, and repeat. But try not to lose your cool and break anything if things aren't going well. Its easy - I know.
All the best with it.
