EQ boadcasting not working.

I've been trying to setup broadcasting for 5 characters in EQ.
Nothing complicated (or so I thought), simply press a key (G1 - G12 on a Corsair K95) and have a key press on the the other 4 instances.
I have defined the 'G' keys as Ctrl+Shit+x (x is 1 through 0, - and =).
If I press G1 on the main instance, I get the popup I have set, "G1 Pressed", but nothing happens on the other instances.
If I press that key on any of the other instances, the action I have set works.
So it definitely appears that there is something preventing broadcasting.
Even if I just turn on basic keyboard broadcasting, nothing is going to any other instance.
I have confirmed that the 'Disable capabilities to control multiple windows ...." is NOT checked.
Any thoughts, suggestions, wild ideas welcomed.
Thank you.