[Neil]

As a supervisor/manager of people you have to give an employee a roasting if they are doing something wrong one minute then discus work with them the next minute - its called getting on with the job and being a good supervisor/manager.

Maybe that is what's going on. You can't work for someone if you can't speak with them. Its called a breakdown in trust between employer and employee and it usually states in your contract/terms and conditions that a breakdown in trust is one of the reason to terminate your contract.