Targeting a flash MoviClip from Presenter

I've loaded a swf into one of my slides. From this swf file I want to target a MovieClip within the same file.

The AS 2.0 code looks like this: 

printBut.onRelease = function()

{

printed = PrintScaledMC (_parent.cert_mc)

}

cert_mc is the MovieClip I`m trying to target from the button.

It works fine from the flash IDE but when I publish from Presenter it just hangs.

This must be a target path issue. Has anyone had any experience with this issue.

Thanks.