Combo Box to change MediaPlayback path?

[Hayterja]

I'm a total novice with actionscript and I have a bit of a problem.

I can't seem to get the value out of a combo box when it changes.

So when the user changes the selected item in the combo box, the contentPath of a MediaPlayback control needs to be changed to that value.

This is probably really easy, but I have no idea! lol ;)

Thanks