Signed in, but can't access account, wish list...

Question

I am signed into iTunes, but if I click on my name (top right), try to access my account, try to look at my wish list or add to my wish list, I get a window asking me to enter my password.  When I enter my password, the same window pops up again asking for me to enter my password (it does not say the password or Apple ID is incorrect).  Keep in mind that I AM SIGNED IN already.  I can still make purchases and rent movies.  I'm running iTunes 10.4.1 and Lion.  I have reset my password, just to see if that was the problem.  I have quit and re-started several times.  I don't know what else to try.
Any ideas?

Answer 1

I use the UK iTunes store.
But my problem has been solved.  It was painful.  It took most of a day.  It started with emails to the 'ExpressLane' help centre (very unhelpful, they basically sent me a bunch of links that didn't help), and ended with several phone calls to Apple Care. No one could help me, so I kept getting passed on to higher-level technicians.
I'm not super technical, but this is how it was solved:
After trying an endless list of suggestions from the technicians, they had me bring up my Library Folder through the Finder's 'Go' menu.  I needed to press the Alt key to make the Library show up.  I then opened the Preferences Folder in the Library Folder.  I dragged every file from the Preferences Folder to a new Folder on the desktop.  I can't remember if I restarted my Mac, but afterwards, I had full access to my iTunes account.
HOWEVER, it can be very dangerous to just empty your Preferences Folder.  I was lead to believe you could lose all sorts of data: browser bookmarks, calendar events, contacts, photo and music libraries, etc.  So the technician had me keep the Preferences Folder on my desktop, and move a bunch of the files back, specifically a lot of the '.plist' and 'lockfile' files.  Basically all the files that had to do with the applications I use most.  I still have the old preferences in a folder, just in case something doesn't work in the future.  But I think the bottom line is that one (or more) of the files in the Preferences Folder of the Library Folder was causing the problem.  I suppose you could try to remove the files one by one to find the specific culprit, but I have over 400 files.  If you are clever, you could try something like moving half, then the other half and working it down more scientifically.
I hope that helps.  Everyone I spoke to said they had never heard about this problem before.  I'm sorry I'm not better at describing the procedure.  But it definitely had something to do with a file (or files) in my Preferences Folder.