Need help getting scroller scrollable by keyboard

I’m trying to make the scroller to scroll by pressing the ‘r’ and ‘l’ buttons. Right and left subsequently. Anyway, it doesn’t work. I’ve used a setInterval function but I’m having trouble getting it activated with the listener function set up for the keys.

Any help here is appreciated.

ActionScript Code:

ok, tried to make an edit, but the computer I’m using messed up the format of the code, I’ll be back later to post the original code when I get back to my regular computer. Anyway, there might be enough info below to figure it out.