Text Appearing as 1-Pixel-Sized Boxes

Greetings,

I'm having a problem with text inside Photoshop. I've never had this problem before so I'm not sure what's causing it or how to fix it-- obviously.

I first noticed this problem when I was doing some work in Photoshop earlier today. I was working on a 1024 x 1024 image and noticed that when I tried to add text that I couldn't see it at all. It wasn't hidden behind any layers as the text layer was at the top, the opacity was set to 100%, the layer wasn't hidden, so it should have been visible... but it wasn't. I tried increasing the font size up to the max but again I couldn't see it.

Wondering what the heck was going on I created a new image file at 190 x 190 pixels and tried to add in text. This time something appeared and I realized why I couldn't see the text on the previous piece... because the text, for some reason, is appearing as tiny 1 pixel by 1 pixel sized boxes (and the font size is set to 72). If I lower the font size to anything below 72, than the boxes simply disappear. It doesn't matter if it's custom font or the standard font, it all does the same thing.

I was doing some work yesterday in Photoshop so I'm not sure if I accidentally hit some option that's causing this and didn't realize it; though the font was working yesterday...
I've been trying to trace back through the option panels to see if there's anything that might cause this to happen but I haven't found anything yet.

Does anyone happen to know what's going on here and how I can fix this?
Any help would be much appreciated. Thank you for your time.

(P.S. I'm using Photoshop CS2, in case anyone needs to know.)

Check your DPI (image -> size), set it to 72 for normal screen use.

Sorry for not replying in so long... Unfortunately my computer's registry got corrupted and I had to take it in for repairs.

Anyway... Is there any way I can change the DPI on an existing image without increasing the image's size, or is that not possible?
I ask because for the image I mentioned above, the 1024 x 1024 sized image, when I set the DPI to 72 it shoots the image size up to something like 72,100 pixels. When I try to enlarge the image to something like that... my computer just wigs out...

Well, make it 1024px * 1024px @ 72 DPI?

It's an existing image, not one I'm making from scratch.
But I think I figured it out... Looks like I just need to uncheck "Resample Image".