Why can't I buy the Card?

I spent hours creating a card in iPhoto. Every time I go to purchase it get an error that "the address/city/state/zip is incorrect and try to correct it. This is the correct address of my friend. I even checked it at USPS. I've sent cards before and never ever had this problem. I'm so angry that this is happening and have no support from iPhoto at all. I must have logged in a dozen times to re- enter my account details, my address, the recipientEvery time I re edit the address I get this stinking error. I still use iPhoto '09, and recently used it and sent my card... with no problems. I don't know what to do or whom to contact.... Please help me.