I have had the same problem. It was working fine for one day, then the next day i started getting the "Messaging Failed" error. I called sprint to see if it was a problem with my powers vision and they had told me that my picture messaging was took off my account. They told me that the power vision pack does not include pic/messaging but they could see where I used it but was not charged. I really need this app working because I do not have everyone's phone email address. PLEASE.. PLEASE.. HELP!!!!!!!