Thx for the help, I got it working now. The main problem was that the setEnabled() method of the rtsCam was empty and the update loop of rtsCam was allways running. Thats what happens if you copy&paste 
Thx for the help, I got it working now. The main problem was that the setEnabled() method of the rtsCam was empty and the update loop of rtsCam was allways running. Thats what happens if you copy&paste