_xmouse on resized movieclip

Question

I am creating a video player and have a scrub bar which you
can click on the timeline to get a point in the video.
The player is dynamic in size and can be opened at any size
you require, set by the movie dimensions in the HTML.
I have the controls for the player resizing and positioning
dynamically with the width of the movie, so the scrub bar is
dynamically changed in length.
Everything works except when I click on the bar and retrieve
the _xmouse position is is still returning the original coordinates
of the movieclip, its size when created.
The width of the bar in pixels is being returned correctly
when I check, it is just the _xmouse coordinates which are
returning original values.
e.g. (for ease I have rounded things up)
If I increase the width of the movieclip from its original
400px to 800px wide, when I click 3/4 of the way along the resized
movieclip I get a result of 300px instead of 600px.
Do I have to reset something?
Thanks

Answer 1

use:
content_mc.work_btn.mouseChildren=false
content_mc.work_btn.buttonMode=true;