What's the 3x4 multi-switch that you mention. AFAKI the only switchs you can should use for the MPEG4 HD channels with the HR21 is the WB68 or WB616 if you need more then the four outputs from the LNB on the dish. Exception is if you're using a SWM LNB or SWM8 switch then you're using splitters.I have a hr21 dvr with a am21 off air tuner with a square shooter antenna and a 3x4 multi-switch. my receiver needs to be rebooted everyday at least once this is my second dvr in less than one month trying to fix this problem any ideas what might be the problem?![]()