Bringing it all together
On frames 6 of the box and button layers, drag the grey bar and text box up so it looks like mine below.

In the actions layer click on frame 1 and add a stop action. Do the same for frame 6.
Now in your button layer, select the button in frame 1 and add
on (release)
{
gotoAndPlay(2);
}
And on frame 6 of the same layer add this to the button.
on (release)
{
gotoAndPlay(7);
}
Publish your movie and hopefully it should work. If you want to integrate this into your interface just cut all the frames and paste them into a movieclip. To make it so the text box is retracted to begin with, drag the box and button up to touch the bar in frames 1 and 12 and at frame six have them be extended out. If you have any questions feel free to email me or visit my website www.nerdfit.com