[Solved] Photoshop - text tool problems

I am trying to type into Photoshop but when I do it displays the text too small. For example I have made the text tool size 12 pt but when I type it displays the text about 1 pt. Can someone please tell me why this is happening to me, and how I can solve this problem? Thanks in advance.

I have just solved the problem. I looked in the image size and changed the resolution to 72, then it worked for me.