Bar disappears!

Hi, I was setting up the bar for the first time. Loved that I could see it on the back-end page as well as in the Preview Mode on my live site.

I don’t know what caused this, but suddenly, the bar is nowhere to be seem!

I have:
– purged my cache (browser as well as site)
– trying uninstalling/reinstalling
– Tried to activate on live site (no bar)

Help!
What should I do/try to recover the bar view?