This application was designed to start an application - and possibly play music - when a specified bluetooth device connects to your phone.
The application triggers a generic "Play" command to the system which most of the common music application use.
This was tested working on Spotify (my first personal need).
Should you have a problem, you may try and set a delay before the "Play" command is triggered.
If that does not solve the problem, please email me :)
OK, so NOW, it is fixed.
Sorry for the inconvenience...