I'm having trouble distributing an app to ad hoc testers who use original iPads with iOS 5.1.1 using over-the-air distribution. The app runs correctly on the 5.1 and 6.1 simulators. It works correctly on tethered iOS 5.1 original iPads and iOS 6.1 iPads. OTA ad hoc downloads to 6.1 iPads work fine. But the OTA ad hoc distribution to the original iPads fails, "Unable to Download Application".
I checked that the UDID is correct.
I tried wiping all the profiles from an 5.1 iPad. The provisioning profile showed up after tethered download but the ad hoc profile didn't after the failed OTA download. An ideas?
Thanks--