Aveo LS Multiplex bluetooth does not work any more.

[dimitrisst]

Hi guys,
if you can spare some time, i have a question.
I have an Aveo LS Multiplex that comes with a DVD/GPS/Bluetooth/rear camera system like this

Until now it worked like a charm
Last week, my battery was drained so i used power cables to the battery and with the help of a friend the car engine started.
But from this time on, the bluetooth never worked again.
I can browse in the menus but it keeps showing a message "Disconnect" and pairing/connect does not work.
I tried to reset it from the small hole on the bottome right of the unit, i also pulled out the fuse from the car's fuse box to cut the power but this message is keep showing and bluetooth does not work.
Do you have any ideas what can i do?