All my music is gone

well there’s something else happening that I think might be connected with the dissapearence of my music: my Fuze seems to be disconnecting randomly, especially when i’m transferring something or using MediaMonkey. It took me 5 tries to get all my music back onto my Fuze because of this. There seems to be no damage to the cord, but just out of precaution, how do I acquire another Fuze USB cord? and furthermore do you think that the fact that I sometimes carry my USB cord in my pocket, might cause problems with the cord? Do you think that the Fuze may have gotten some dirt inside it from the only open port on it, the USB connector (I have a microcard in the other slot)?

I’ve only been having real problems with my Fuze when I keep it plugged in for longer than 4 hours or so (I have to add all the album covers back to my mp3s one by one, which will take much longer than that).