This has probably been discussed before, so just bear with me.
 

Hi there, just today, I plugged in my 4th Gen iPod into my computer [PC, Win XP pro]. from there on, I went and started up winamp, and used that to play my iPod music [the plugin for winamp, i'm sure you know]. When I went to do that, I minimized everything on the left side of the winamp window so I can access my iPod faster. In the process, the device for the iPod didn't show up. I checked again, and reinstalled the plug in, and it still didn't show. I then checked out my iTunes program, and it showed my iPod, but now...all my music on there is gone. I then disconnected the iPod and then looked at my music manually...and all my music is gone. The weird thing is, when I went to re-plug the iPod back in, I checked out it's properties in 'My Computer' and it said the space on the iPod was still being used. I don't get it, and it's very frustrating. I'm hoping to hear from someone soon. Thanks.


PS, I didn't know where to put this, so I hope it's in the right place. If it's not, i'm sorry.

this happened to me once with my ipod nano, but it fixed itself within a day. I hope the same happens with you!