drop down menu for stroke not working

The menu won't open in a new document I am creating. It isn't highlighted and I don't know why.

I added a stroke line under some text in a pages 09 document and it worked. I just went back to that document and in the text inspector, under graphics, under stroke is the word None and then if I click the drop down menu there are other choices. But in this new document no. I have opened other documents to see what happens and the stroke drop down menu won't work. I don't see what the difference is between the document where it works and the others.

If anyone has a clue, I'd sure appreciate it.