When you're making a HUD like that it's a good idea to make it on another layer above everything else.
The Edit Box you made was scrolling along with the rest of the screen because it wants to stay in the same relative position that it started in. Windows controls like that work funny. It's best to avoid them if you can. Anyway, since you had it placed outside of the viewable area you would never see it because it was always scrolling away.
If you make a separate layer for your HUD like I showed in that pic it will work fine. Oh, and setting the scroll rate to 0% means that the HUD layer won't scroll with the rest of the layers, it will always stay in that position.