Black screen when the app install at android

Unity Engine
,
1

i was build android AR app with Unity + Vuforia,and i have install at my android device when i open the app only show Unity Splash Screen and than black screen. but at the Unity i try to play the animation it work. i dont know why dont work at my android device?
anyone have same problem?maybe someone can help me.

Thanks Before:)

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2

Does adb logcat complain something? Did you try with mobile shader?

3

Hey its the issue with unity version which you are using. I too faced the same issue. Trying using unity 4.3.4f1 it solved my issue.