Thanks Duct Tape! Here is a link, I stripped all of the other remote configs that are not involved:[Link: 1drv.ms]
Yes, the 990i works fine if I unplug the 250 and just keep 250i.
I did not create a separate CCP config for the 990i - I simply downloaded the same config from the 990 into.
I also tried messing with the settings for the Secondary RF ID on the MSC-400 including turning it off. Nothing seemed to make a difference.
I read the msc-400 docs again and I wonder if it is the fact that the two RF Inputs are wired in parallel. I image that the RF signals are aggregated so having different bandwidths on the same line probably cancels everything out.
I sent an email to URC via their web page but since I am a consumer I doubt I will hear anything back. Worth a shot I suppose.
Appreciate all of the help.