Need help on this one......After I download a song I double click on that song and nothing happens. I can go to other songs that I have downloaded in the past and they still work. I havent had this problem in the past, just can't figure it out.

hey everyone!
i am running limewire 2.8 (i think!) on a Mac OS 9.2 beige power mac G3. I recently upgraded from my usual limewire 2.6 as the prompt told me to. Now, i can download my songs just fine, however, when i go to open them or put them into my iTunes or QuickTime Player, it says "The document _________ could not be opened because the application program that created it could not be found. Could not find a translation extenison with appropriate translators." What can i do? I have tried uninstalling and re-downloading numerous times! Does anyone know which translator i need? how to get it? or if i should just give up? also, does anyone know if i can get a link to re-download my old limewire?? thanks for any help you can provide!