What do I do if I’ve changed the time in my mobile device and my Nokia Music tracks won’t play anymore?
Check that you have set the date and time correct. If necessary, correct them by going to Tools > Settings > General > Date and time. You may also need to refresh your music library in the music player. If the tracks still do not play, wait for 5 minutes, or reboot the device after you have changed the time and date. The date and time information is used when verifying the licenses to play your tracks.