I apologize if this question has been asked before but I am new to this forum and trying to upgrade my system and haven't had time to read through all the threads. I currently have a DishPro 500 with a quad LNB and 4 311 receivers hooked up. I tried to replace one of the 311 receivers with a 322 receiver running the cable through the supplied separator. This connection setup is not working and was told I need to add a switch to the system. What switch do I add and what is the best way to complete this task? Thanks for any help.