Page 1 of help please - what keeps happening to my chuffing music???!!!

hi there. i am confused. Media player keeps eating my music!!! I add the tracks to a new playlist etc and all works fine - sweet music for a short period of time (around 1-2 weeks usually). then I open playlist (any playlist) and get a long list of these dudes - !!!!!!!!! and none of the music is there - none at all. I have lots of playlists on media player and I have to transfer the same tracks over again (and Again). What is going on here? :(

Any ideas


cheers