It IS really difficult, because you can't put your children at risk.
So---repackage your communication. You can give him orders, arguments, but what you WANT is compliance. You want him to do what you want him to do (or not do what he's doing). So what's important to HIM.
We do this in corporate america....we can't just give orders (seems like we could, doesn't it)...we have to get 'buy in' from our subordinates/the people on our team.
Like it or not, he's on your team. You need his buy-in to get his compliance. What motivates him? When you have talked to him before, and it has gone WELL, how were you talking to him? Is he the kind of person that likes to be ASKED his opinion? Is he the kind of person that needs a lot of data? Is he the kind of person that just needs to know the high level impact? Is he the sports guy (would it help to compare this to a football game?)
