Button, movie clip

1

im making a button. on the over i want a lighting flash to slide by from left to right… i have it all done well but i want to button area to be a box around the text and when i make the box it shows through the box too, not only the text, and i cant seem to make transparent boxes for some reason. maybe i need to add them after i covnert to button, iuno. any1 help?