Remote queue processing stopped working after update to 3.6.3

I have this problem. I go to my account on and get the API-Key, I go to my phplist installation and enter the API-Key, it says “Activated”, and I created several new campaigns and added them to the process queue. Still, wenn I go back to the status tab in my account on it still says:
We have not detected any installations yet

And mails are not sent if I dont do it manually.

Could you please help?