Right. im not jailbroken and everytime i try to download an app from the appstore, from my iphone (for example facebook app, wich is free.) i type in my password and email, for my itunes account. it tells me a sign in is required, so i press continue and it takes me to my bank details and everythings right on my bank details and everything so i press done, and then it says there was a problem with a previous purchase and it tells me to type in another payment method?? ive been using this account for 2 years and had no problems. whats wrong please help?? (ive tried restoring my iphone and i still get the error.).