I have 2 openers, both Liftmaster 8550 and I am trying to connect an internet gateway. I registered the internet gateway with it's serial number and get a green light on the gateway. When I go to "add a garage door opener" and press the yellow button on the opener, nothing happens, the app (or computer, I tried both) just sits there waiting and eventually I get a message to try again later. Any ideas how to fix this? The garage openers are less than 40 feet from the openers so i don't think this would be a problem.