Help looping button

Hi.

I am using flash 8.

I cannot get my head around this!

I have a simple message-board, that dynamically loads text from php and a text file!

I have created an up and down button to scroll the text box when you press it!

This works fine, but I cannot figure out how to keep scrolling the text if you hold the button down.

here is my code for the down button (all my attempts at looping etc I got rid of):

on (press) {
	GuestBook.scroll++;
	if (myscroll3._y<(170-myscroll3._height+myscroll3.top)) {
		myscroll3._y = myscroll3._y+((200-myscroll3._height)/3);
	}
}

Any suggestions will be highly appreciated. Half of my hair has already gone!

Thanks, John.