Cant add opener to account or app. I have a working gateway and app for my double door. I wanted to add the single door to the app. The single door opener is 1/3 hp liftmaster, about 2-3 years old, purple button and wire. I installed a 888LM control panel., it works, and the remote works. However when I use the app or website to add a device, and click "add", it quickly tells me to make sure my LED is green, before I even get a chance to push the learn button on the control panel twice. Any ideas to try. I tried both app and website, same result.