Why startDrag doesn't work with rotaionX or Y ? plz read

Hi,

I’m facing a strange problem, I’m using CS4 and AS3 and I got a text scroller that uses startDrag,
I wrap all this in a function that handles a sort of 3D roationX with rotation and rotationY,
why is the startDrag not working when rotationX or Y are used ?
Is it “normal” ?

Thanks for your tips,