I tried without the button but it did not work.
So i finally placed a copy of the scrolling text
mc directly on the scene, but offscreen,
so I just need to swap the _x of the rotating square
and of my text mc...
It's not really neat but it works!
I've also tried the same thing whith load and attachmovie
but it still doesn't work...
If you have another idea i will be glad to try...
Thanks for help