ios app crashes on splash screen

hi , I wanted to test my first ios unity app . it’s a camera viewing a simple cube . but when I build and run my app it crashes at splash screen . I think everything’s up to date . my mac osx version is 10.7.3 , my unity is 3.5.0f5 my ipad ios is 5.1 and I downloaded xcode 4.3.2 . the app icon is in my ipad but the app crashes on splash screen . is there any specific thing I should do or something in build setting I should set ?

thanks

Update Unity to 3.5.1 or downgrade xcode to 4.3.1. This is probably related to a known issue. You’d know for sure by looking at the output of the debug session in xcode (see if it is complaining about a splash screen).

From the Unity 3.5.1 changelog [http://unity3d.com/unity/whats-new/unity-3.5.1][1]

iOS: Fixed basic license splash screen
issue when application is built with
Xcode 4.3.x.