Help Needed with Tempo

Somehow, someway and I don’t know how I did it but I have ----

No Tempo - Editing Possible. (Tempotrack is Switched Off)

Does anyone know how to switch it back ON ? I can’t find the way. My brain is not working well.
Thanks for any help you can give me–AGAIN, I know. I have Cubase 6.

Does it show “Fixed” or “Track” in the Transport Bar?

Hi Vic. Some how I got it back. But I sure do thank you for your thoughts. Sorry to be such a pain.