I haven't been able to connect to the iTunes Store since July 2012. There are no error messages when I try to connect, just nothing. I've run the diagnostic tests and it is aware that it cannot connect. I've tried reinstalling and uninstalling older and current versions of iTunes, I've tried repairing it, I've tried changing firewall settings. Nothing works. My system is Windows XP Service Pack 2, 32 bit on AMD Sempron processor. Help, anyone?