Remote app won't find iTunes library
Two macs on an Ethernet network through wireless router with wifi. New iMac - Remote finds iTunes library just fine. Old Mac - osx 10.5.8 iTunes 10.6.3 - iTunes "sees" my iPhone or iPad, but the app spins until "can't find library - check network settings" comes up. I have followed all the troubleshooting tips and suggestions here to no avail.
iPhone 3GS - iOS 6.1.3
iPad 4
Please help if you can. This has sucked the life out of a perfectly good Sunday afternoon.