Changing Color of seekBar component

hi,
i m creating a video player, in which i m using control of
play, pause, seekbar etc.
i want to chnage the color of prograss of seekbar at runtime
as user select different color from colorPicker component.
and i know how to apply the color at runtime using colot
transfor class.
The problem is i m unable to refer the movieclip of seekbar
which contain the shape of pregrass.
and if entered the reference then it throug error.
i m using AS3.0 version. so please help me to how can i refer
the prograss shape inside of seekBar component to change the color
at runtime.
Thanks in Advance.

Once you drag it to the stage, look for it in your library.
When you open it from the library you can edit the appearance to be
whatever you want.

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