Don't give up! I had a lot of trouble getting it right at first. I was at the point where help would fix various things but when I went on-line and tried to fix it, nothing helped. I eventually wiped my 880 clean and went on the web and wiped that clean--started over and did ONE activity. I couldn't get that quite right so I called and found someone very helpful. Moral of story: start simple and keep calling until you find a bright lightbulb. I now have 7 complex activities working just fine with a projector, 990, 3 amps, DEQX electronic crossover, SAT HD tuner, and CD/DVD player. It can be done!