Error communicating with Garmin device when trying settings

Hi!

I've just uploaded a Beta version of my watchface to try out the settings from the GCM app, but when I tap on settings, an empty settings Activity shows up, and a couple of seconds later this toast is shown:
"There was a problem communicating with your Garmin device."

Could it be a problem that the settings are really big and it times out somehow during the download? In the simulator it works without a hinch.