It sounds like I have a similar problem, but I do not know how to troubleshoot/fix. I have an HP 475. The server finds and gathers my Itunes library, but once it has completed copying all the songs, it goes from “Enabled” to “Disabled”. When I enable it again, it will appear on my network for about 10-15 seconds, then it disables and disappears. I have contacted HP, but so far they have not solved the problem. We have deleted the Itunes library from the server and allowed it to reacquire the database with the same results. Itunes streams from the server while the library is being populated, but disables when complete. My library is 173gig, so this takes a long time during which Itunes shares properly to all PC’s until completed. Then, it is gone again.
The entire network is hardwired. No wireless. I have Verizon Fios so the modem/router is Actiontec. (Upnp is enabled!) Greatly appreciate any help!
Bob