Question about using text

So, I'm having a problem with photoshop CS. I've been making quote icons lately, and this morning I opened a new 100x100 blank project, went to create a layer to put some text on it, and only the box shows up. When I start typing, nothing appears, the icon remains blank. Is there some setting that I may have accidentally changed? Because I can't figure out how to get the text to show up again, and I've checked everything I know that could mess with it (ie: resolution, etc). Any help would be great!

<3 Sammy