If I had to guess, it sounds like your ibay permissions are incorrect, I'd check that first - do you have it set to LAN, Internet, Password? Not sure which one, but check that first in the server-manager.
As far as Netjuke -- I can't recommend it enough after using the MP3 RPM, Andromeda, and Netjuke.
Honestly, other than setting up the database, which the netjuke installation can handle if I remember correctly, just unzip the file to an ibay, go to the setup page, follow the instructions for saving and replacing the preference file, and everything else is automated other than uploading your music.
And if you want to remove it later, just delete the ibay or the directory, remove the mySQL database, and you're set.
The Netjuke mailing list is very helpful, and some of the changes coming in 118 are very exciting.
Paul