Continuous scroll of dynamic text on button roll over?

I have a dynamic text box and two bottons to scroll the text. but the buttons only scroll one line at a time. I need them to continuously scroll down.
Please walk me through this.
I saw a post that said this could be done thru certian actionscripting, which was places on the movice clip the text was in. But my text box is in inside a movie clip, and when i tried to put it inside of one, the text did not load anymore.

so please walk me through the simplest way to do this. i dont need a scroll bar, just 2 buttons that continuously scrol the text on roll over.

Thanks a ton!!!