Diggit Drupalextras

I'm trying to use the twitter module on a new site, I have the app built, code and secret entered into twitter setup and everything looks right.
But when I add content and look for the option to post to twitter, that option is missing/not available.
I have done a fairly exhaustive search on this with no luck.
I know I have forgotten to do something but I need help pointing me in the right direction please.