I have a Slingbox 500, which used to work just fine with my Channel Master DVR+; however, since I connected a cable box to the Slingbox, I can no longer use the DVR+. The DVR+ uses the HDMI input and the cable box uses the composite on the Slingbox. The cable box remote still works fine, but the DVR+ does nothing. It shows the correct onscreen remote, but it does not change channels, etc. It does nothing.
I have tried reconfiguring, unplugging the cable box from the Slingbox, even completely resetting the Slingbox. Nothing has worked. Any suggestions?