Warning Message - Citroen Assisatnce Service Downgraded

[Guest kerlaz]

More often than not upon putting the key in the ignition i get a message on the navidrive screen showing a red bordered triangular road sign icon saying 'Citroen assistance service downgraded'. At the same time I get a LED flashing just above the SOS button on the navidrive control. Any idea what this means.

I'm not sure if its related but I also suffer from freezing of the navidrive screen in 'jukebox mode' and 'telephone mode' with the music playback stuttering to a halt.

 

Any help appreciated, car is 2007 1.6 HDI VTX+.