Could not copy song to Ipod Touch due to unknown error (-50)

Question

I just received a new third generation Ipod Touch as a gift and installed the latest iTunes directly from Apple's website onto my computer (Windows 7 32-bit). I added my music folder to the library and imported an m3u playlist to iTunes. Then I connected my iTouch, followed the instructions to set it up, and then I wanted to sync my songs to my iTouch. I only wanted to sync the songs on my "Favorites" playlist that I imported, so under the Music sync settings, I selected the option to only sync selected songs, playlists, etc. and selected the Favorites playlist.
Then I attempted to sync the songs, but only a few songs would sync before an error popped up saying that it could not copy a specific song to the device due to an unknown error (-50). This error sometimes repeats for multiple songs and then the syncing stops. Each time I try to sync it again, it might sync a few more songs, but will always be interrupted by the error, after which it stops syncing. These songs are MP3 files. I have already tried uninstalling and reinstalling iTunes.
This is extremely frustrating and I don't know what to do. Thank you in advance for any help you can provide.

Answer 1

I've managed to fix the problem and discovered the reason for it. When I dragged the playlist to the iTouch section in my iTunes (instead of pressing the "Sync" button) to sync the playlist to my device, it synced everything except for the handful of songs that were giving me errors. Then the error messages it displayed were more helpful in indicating what the problem was. They could not locate the song in the playlist on my computer because I had changed the MP3 tags a long time ago, sometime after I added them to the playlist, and it never updated. (Note: the playlist I was syncing was originally made in Zune player and then I saved it as m3u format) Hope this helps someone with a similar problem in the future.