Problem with interaction between two Interactive MocieClips in Cube

Hello,

I’am relatively new with PV3D. I made a simple cube with two Planes, the Movieclips added from the library.
The cube rotates and the movieclips uses timeline animations. So far no problem. But the following gives me a headacke; How I can moveclip one, stopping at the end of the timeline, activate movieclip two to play?

Anyone a suggestion , I would be greatfull!