Hi guys.  Hoping I am missing something obvious here.  I have filled up IR Ports 1-6 on my MSC-400 so am would like to add a device using the IR/Serial Ports 7-12.  I was able to locate a set of IRS6 emitters and have the hardware setup.

But in Complete Control, I cannot select the ports like you see here:



But if I look under my MX-900 config, I see them:



Is there something I need to change?  Or is the MX-990 (and the MX-980 it would see) truly limited in this regard?

Thanks
Ernie