Sliding panel content

Hi,

What is the easiest way to go about having a ‘button’, that when rolled over moves properly onto the screen and when rolled out of returns to its original position, But… with content in the ‘button’ such as volume control, play and stop buttons for music of the main movie that the slider ‘button’ will sit on. I’ve managed to get the controls, and the slider to work separately, but not once the controls are placed on the slider. Here is my fla.

sorry its quite large
http://www.phone-pages.org.uk/cathy/flashexample/music.fla

Thanks!