Please help gallery

Hi I would really appreciate it if someone could help me with and explain this to me.

I’m creating the photo gallery with the thumbnail scrollebar below it.
Instead I want the scroller to the right so I simply moved the movie clip “thumbnail_mc” and the movieclips “hit_left” and “hit_right” and the mask together to the right of the scene.
As far as I understood the x and y values should adjust themselves and the code adapt to the new x and y values. It doesn’t, although the problem seem to be more with changing the x value because the scroller still works fine if I move the above mentioned up and down.

I can’t figure out what the problem might be or how to adapt the code.

Please advise :expressionless: