Can't sign into iTunes Store - endless loop. Help!!
I am running iTunes 10.4 under OS X 10.7. All of a sudden I can't sign into my iTunes Store account. I am entering the correct password, but it just keeps asking me for my Apple ID and password over and over again. I enter that information, and it keeps asking me again and again. This only just started happening - that was well after I upgraded to Lion, so I know that's not the reason.
Has this happened to anyone else? If so, what did you do about it? How can I fix this?
iMac Quad Core i5, Mac OS X (10.7)