I've had a simple setup with a pair of DSP5000s and a 562v for a couple of years, and recently I had the opportunity to add a DSP5000C.
This is where the problems started; I expected to be able to simply add the centre speaker, but very quickly found that I needed a 565 in order to get it to work. A month later I bought a 565z3 and made up the cables to connect everything together.
After connecting the 565 and 562v I tried to set one as a controller, but when I press clear on the MSR they both say "Cont" or "Controller".
I'm sure I will have more questions regarding setting this up but I'd be happy getting started resolving this issue

Any help would be much appreciated