First I'd like to remind people to come back to their initial question/post and click on "resolved" if someone answered a question for you. This updates the forum list.
Diane, if you do not see a highlighted edit box and a blinking cursor in the edit box your cursor is currently located at, it is most likely caused by your browser not properly interpreting the code. Try using a different browser and see if that helps. You may just want to try and relaunch your browser to see if that fixes the problem.
I use a mac and a pc and various different browsers (safari, camino, firefox, IE, avant, netscape, etc) and they all produce a blinking cursor and the edit box is outlined (highlighted) with a blue glow.
Hope this helps, and don't forget tom come back and click the "resolved" if your problem is resolved :)