@Joanna: I had a similiar issue getting the prompts to react. My first issue was that I was trying to get the prompt while in debugging mode. Once I stopped it, I was able to get the prompts.
The second problem I had seeing it came because I clicked in between text, but then left my cursor on the same line. In that instance, the error message box was coming up before the drop down was, and covered it up so I couldn't see it. If you move your mouse cursor just above the line, I could then see the drop down box in addition to the error message prompt.