Trial functional?

Hi, I just tried the trial of SimpleCMS. I got into my site index.html, clicked to define editable areas, then  hit "edit content" but I can't make any changes. It just says the area is editable then asks me if I want to save. Also it only lets me choose images, not text. When I hit save and then try to edit it takes me back to the "find your index.html" page. Is the trial upposed to work, or just to let us see the interface? Thanks.

Lee!