Mediacontroller and skins

If I add the FLVPlayBack component to the stage then one of the parameters is skin.

But if I add a seperate mediadisplay and mediacontroller component, the controller no longer has the skin parameter.

I’ve tried adding this to the actions

medcontroller.skin = “TheSkin.swf”

but no luck.

Anyone know how to set the skin of a MediaController as opposed to the skin of the FLVPlayBack?