I-pod library wont be copied/moved to i-tunes

Hello,
Most of my i-pod music collection (3,000+ tunes) is not from Appple store.
Originally saved to older version i-tunes. Everything worked fine. That computer died. All files lost.
Only music library saved is on my 'classic i-pod'.
Now newer version of i-tunes on new HP computer won't save i-pod content to i-tunes music library. It does show all i-pod music under my i-pod name. It won't allow me to save this i-pod music anywhere either by copy or move. I un-plug the i-pod and i-tunes shows nothing from the i-pod.
I need some kinda back-up.
HELP!!!!!
AcadianaRamDad