Target movie clip from another movie clip

Hi all

I got a statusbar movie clip in the main timeline, which contains a progress bar movie clip. Now my question is how can we target loaded swf in the dummy movieclip in the main timeline so the progress bar can play respectively?

I use
var p = _root.dummy._currentframe / _root.dummy._totalframes
and
var s:Number = int(_root.dummy. _currentframe / 12)
to calculate the movement of the clip but is not working at all.

The target _root.dummy is working for the movie control.

Thanks in advance for all your help.