Photo/scale error! ~~ please help!

i am trying to figure out why my mask&pic does not stay within the specified area…

I tried everything but can’t find a way around it

The problem MAY be that the pic&mask are not at 0 in x-axel.
I think it’s something with this line:
diffX = _root._xmouse - _root.mask._x;

any suggestions?

the fla can be found here: