Midi Contoller changes plug-in settings

[vosi]

Dear Ableton-Community, I have the following problem:
As soon as I switch on my MIDI-controller (it's a Roland keytar) some of the settings of the plug-in I wish to control are changed. It seems as if the MIDI-controller sends CCs to the selected plug-in. So every time I play the first note, the sound's changed. This problem however doesn't occur when I switch on the controller before I boot Ableton Live.
There are no MIDI-commands mapped. And it happens no matter if I switch-on the remote function of the controller or not. Any solutions? Thx in advance!

[Tarekith]

Turn the controller on before you start Live, just like you have to do with a soundcard.