Button inside a Movie Clip

[Anarkiuk]

Hi

Ok, so i have a button inside a movie clip.

I want the button, when i click it, to go to a web page in a new window.

I have put my script on the top layer of the main timeline, in a layer called 'controls'

Here is the script:

function openPhotomore(yourEvent:MouseEvent):void {
navigateToURL(new URLRequest("http://anarkiuk.deviantart.com/gallery/#Photograph"),"_blank"); 
};
photomore_btn.addEventListener(MouseEvent.CLICK, openPhotomore);

I have given the button an instance name of 'photomore_btn', but it seems to be inside a tween aswell?

When running the swf i get the error:

1120: Access of undefined property photomore_btn.

I'm new to flash / im confused.

How come it cant find the photomore_btn?

Any help is greatly appreciated, thanks!