I am struggling with my PACE cable box to get the electronic remote on my PC to work. Everything else is working fine. I can watch via the internet and my husband has accessed it from Europe. BUT we cannot change the channel. The cablebox model number is TDC775D. I have selected the appropriate remote option (and tried many of the other options) and located the IR eyes over the black window. When I try to change channels, the picture does blink but does not change. Any suggestions?