Cannot turn on Home Sharing with usual AppleID and password
Today iTunes quit streaming to my AirPort Express in the middle of a song. Sometimes when this has happened before I stop Home Sharing, then restart it and it works again. Today after stopping Home Sharing, I tried to restart it. The screen asks for my AppleID and password, but will not accept it. I have tried every combination of AppleID and password that I have ever used, but none of them work. I even reset my AppleID, no help. I have logged out of iTunes and logged in again (successfully), but Home Sharing won't accept the ID and p/w I just used. Any ideas?
Home PC-OTHER, Windows 7