If you don't make the text area big enough the text won't show when you type, also
is it on top off all the other layers or if the font is too big it will also type invisible.
I also some times have a problem were i can't see the text until i apply it fixed by restarting photoshop.
- Visitor BRK the size should be 9pt
- Visitor TT1 the size should be 10pt
- Visitor TT2 the size should be 13pt
also you can use this the userbar template to get Fan and User text.
http://www.userbars.org/forum/index.php?topic=2163.0