My iphone 4 stopped responding. I connected it to itunes and it said it was in restore mode or something like that and that I had to restore it. I pressed the restore button and it said it was extracting the software. Then it said it was restoring the phone, but then a window pops up saying it coundn't restore it and error code 1611 was displayed. My computer is running windows vista if that matters. I didn't have a problem syncing it when I first got it. Any suggestions?