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.