I'm in over my head. Had D tech come and trouble shoot why one of my hr20 recievers had lost signal on one tuner. I figured my zinwell splitter on my at9 (?) dish had gone bad. Tech said he would rather install a new swm dish for me to get better signal. Okay, great. I get better hd signal numbers. Tech doesn't usually do installs, just service calls for over 5 years. Tech installs dish and then says he is supposed to offer to set up on demand for all of my hr recievers (2 hr20, 1 hr21). Tech installs deca broadband router into my linksys router. Only one reciever can connect to internet/on demand, the other 2 recievers say connection failed. All 3 have deca installed. After Tech talks to D support, I am told that my ATT dsl is the problem! That I need them to open more ports on my dsl modem. Is this right? I even unplugged everything out of my linksys router except for the D broadband modem and still only the one reciever worked for on demand. Ideas? I have plugged the d modem directly into my dsl modem and it still does not work. Both of my other recievers say that they are connected to the network, but not to internet. error code 86-491 comes up.