One Person....

What happens when one person works against the grain of all the other people on the team? They talk a good talk but in reality they are doing whatever they want when no one is looking. They seem to get along well with everyone, laugh and joke and fool around but definitely have their own agenda. What can be done?
I am not talking about our team at kung fu, I am talking about my work team. I seriously don't know what to do, each new initiative is put in place with safe guards so this person doesn't sabotage it. So far we have talked and talked, involved the management team and are very blunt when discussing how we would like things to be run. This person keeps on smiling and nodding and agreeing with everything and then does not stick to the plan. I guess you can really only lead a horse to water, you can't make them drink.

Sifu Robyn Kichko
http://mantismantle.blogspot.ca/