Movie clip in button over function

[Kartik5C42]

hello ,

i want to create a button in my main menu , when user move cursor on button a little text box slide out of a button.

i know this very stupid question,,,,but please help me out

1st image is my menu

in 2nd image the over is a movieclip symbol 

in 3rd image i have applied the classic tween

[Kartik5C42]

well i figured it out.....

you can only preview your movie clip symbol in a button when you test your scene.