Vuforia needs to be played before the build works

Hey Guys,

I'm currently working with the Vuforia Framework and without any reason, appearantly, Vuforia needs to be played in the editor, before it works in the build on android.

Everytime I change some thing in the code, I need to press the little play button, before the build works fine on the android device. It seems that, if I don't start playing, Vuforia does not initialize.

Maybe, somebody of you has a fine idea on how to solve this mystery.

See ya.