I am trying to control a denon receiver, epson projector, comcast cable box, samsung bluray player, pelican a/v switch and a X10 IR receiver. They're all in the same room as the remote, no extender being used. Tried a different camera and still can't see IR blasts from the MX, but could see them from the comcast remote.
These are the settings I'm using for RF control:

At this point I'm assuming the IR portion of the remote is shot, and after the hassle I went through to get the charging base and software from the seller, I'll live with using the MRF-250 for now.