Hi guys!
I think I solved the problem.
I restarted the device, according to [Only registered and activated users can see links. ] as suggested by catymag.
After I did that it seemed to work fine but then I updated the device software with the garmin Webupdater and installed the (GCD File) software [Only registered and activated users can see links. ].

catymag: the windows deffrager doesn't work for me.

Thanks guys for your help.