Please have a look at the provided Sample Project and have a close look at the life-cycle callbacks. You need to call all architectview.on* methods properly, right after the lifecycle call of the Fragment.
I'm trying to make a application but unfortunately I'm suffering some issues. I'm able to compile the application on my MotoDroid 2 Global (Android 2.2) but it crash when I try to init the code with the Wikitude. The error is "Called unimplemented OpenGL ES API" and "FATAL EXCEPTION: GLThread 11".