Ok. Just wondering. I had the same problem - was working for months (dish.sling.com) - then I go to connect today and the site says it can't connect. My router shows my receivers are connected, and it can ping them fine.
The broadband connection showed "not connected" on mine. A reset in that menu wouldn't connect. Resetting the router didn't do anything - it always showed the connection fine. Called dish - they asked if I had an "Ethernet cable" attached to my receiver after I told them it just "stopped working" after 2 months. Of course I said "no - you mean it needed that cable?". haha.
I finally was told to connect it directly to my modem. I got connected. So I reset everything and changed my dhcp range to force a different IP assignment (couldn't get it to release the old one - I am not a network expert by trade
Finally - now a reset in the broadband connection changed the IP address and I got connected.
So I thought I would check