A recently promoted manager (Manager), whom I helped move into a managerial position, frequently escalates my reasonable requests to my boss, without first discussing them with me. Manager does not report to me administratively, but is running a project for which I am accountable.
90% of the time my boss sides with Manager, even though my requests are standard for our environment, and even when Manger is clearly screwing up.
My boss is friendly with Manager, and actively championed Manager's recent promotion.
At this point I feel that any direction I attempt to give to Manager will be overridden by my boss, and I cannot lead this project effectively. I don't think that my boss is deliberately undercutting my authority, but he is relatively inexperienced, and is trying to be nice to his protege.
I know that I am not supposed to give feedback to my boss; Manager at this point has completely shut me off and is not coach-able by me. Any suggestions of how to regain my effectiveness on this project?