os 10.4 and 10.3 printer sharing


I had printer sharing set up between my two imacs (one running 10.4- hooked to printer and the other 10.3) Then two things happened - my son fooled around with the user names on the old imac and we moved the older imac. The older imac still works fine and is networked fine to the internet but when I try to print from it (to the new g5 imac hooked up to the printer) we always get the message printer busy.

The new imac is set up to share.

Can you help?