If you remember the name of the file do a search using Explorer (or even just for .mp3). You may have inadvertently 'unshared' this folder. Go to you LW menu-Tools-Options-Sharing to see if this folder is still being shared (U may need to reAdd it.) Or/& go to your LW Library window & select this shared folder (if it's still in the list) & see if the file is actually there. If you dwnld to a shared folder, check your dwnld folder (Tools-Options-Saving), make a note of its name & path & search for this folder. Keep in mind when files finish dwnlding they move from the incomplete folder to the dwnld folder. You can also have a look at the following thread & see if that's helpful:
http://www.gnutellaforums.com/showth...threadid=25314