I have been having an issue once we upgraded a Set Top Box when switched providers. S70 and NC been working fine for a couple of years and still works great with all other components. Have the correct IR code for the new STB and it tests fine with the S70 but when rerouting it to the NC and IR emitter the STB will not respond. Changed the IR emiitter twice and even changed the port on the NC but still not working. STB is a Motorola HD QIP 7216 1. Any ideas?