Collision problem, please help !

I'm currently making a platformer with someone else and we want the character to be able to slide along walls, much like megamanX.

I have achieved it, and added camera effect to move along the stage and now, instead of sliding, my character sticks to the wall.

My BIG problem is... when I debug the game, everything runs perfectly fine ! How can that be ?

I'm using hitTest with shapeflag to detect collision, does the problem come because flash doesn't update the shape perfectly on every frame ? Is there a way to force refresh maybe ?

Check this out if you don't really understand, try jumping at the walls.
working :
http://www.prevost-jm.com/jack2.swf
not working :
http://www.prevost-jm.com/jack1.swf
(Try jumping on the right wall, while the camera moves, the go to the left to trigger the camera again while you jump to the wall)

Ok...

Corrected the problem by moving all code collision related at the very start of the frame, which means the frame gets refreshed before the tests, but also before correcting position, and player can stay for 1 frame sticking in the walls....

Any idea ?