I have Sony plasma display and need to make it work with standard cable signal. I has external stand alone tv box tuner which worked fine with my regular antena outisde, when I switched over to comcast and got standard cable my plasma can see only 2 chanels. My old TV (non plasma or LCD) can see almost all from 2 to 99. So signal strenght is good but tv box doen't recogniz that signal. I bought DCB-H360R which gave me few HD chanells which are great but it doesn't give me all the chanells aI can see on old TV. What is the problem here?