I am using the MX-850 with the MRF-250 and can't seem to get the 250 to operate anything. The remote and the 250 are set to address #2. The infared remote commands work great with all the equipment, but nothing seems to be going through the emitters even though I see the red lights flicker. Do you think it could just be a bad MRF-250 or does someone have a suggestion to check. I have another 250 and MX-850 in another room and they work perfect. Thanks....