I'm using TestFlight so a few of my testers can test my new/first app. I went through the provisioning assistant to get all my certificates and profile info, followed their steps, used Build and Archive to create the .ipa, etc.
However, my testers are telling me their devices don't have permission. One of the devices is the iPhone 4S.
I'm using xcode 3 (newest version that my OS can have) and my base sdk is iOS 4.3.