[Glyn]

While I haven't used any ministers, generally you have to the turn on minister control for each planet or ship you want to hand over to there incompetence.

While view the planet or ship look for an icon on the top-right order bar that looks like a head. Clicking on that should enable/disable the minister for the plant or ship you are viewing. A head icon should appear in the detail view panel.

Also, the minister must be enabled in the empire options page.

PS. Don't expect the Minister to build what you actually want!