Easy remote setup New account number

I have a new iPhone 7, new Uverse account, new Uverse receiver at new address. I uninstalled old easy remote app which worked great, at recommendation of sales person due to new account. When I reinstalled after I tap "accept" terms the next screen is "connecting to receiver" but never finds receiver on wifi. None of the buttons on the remote screen work. I am not at home so guessing I need to be on same wifi as receiver. Is this correct? The first time I installed the app I was able to log in remotely with my user name and password even though not on same wifi.