I just bought my second HDTV and had directv come out to upgrade my regular DVR to an HD DVR (I already have one installed upstairs on an HDTV). The question is, the installer said he couldn't do the job without installing a second line for the new receiver. I don't get it because I already...

I am NOT tech savvy, but need help. I just upgraded my regular DVR receiver to an HD DVR receiver w/directv (Just purchased a HDTV). The installer told me I had to have two lines to use this new receiver. I don't understand this as I already have one HD DVR receiver in another room. He...