Hy.
I have developed an IOS app in version 5.1 and xcode 4.5.1. After completing the app when I try to run it in the device using ad hoc distribution, the app is unable to install on device. It shows popup "Unable to download application. ' could not be downloaded at this time'".
I have added distribution and developer certificate and it does not give any such alert when installing directly from the xcode but the problem occurs only when installing app from the testflight.
Could someone tell me where I m making a mistake.
Go to Product -> Edit Schema -> Build Configuration
Change Debug to Release and try it.