Okay, I see your problem. Your mine is set to not produce anything. When you right click on a mine, the Mine Production window is brought up. In your case, all of the ore production buttons are unset so the mine will basically just sit there doing nothing.
I admit that the feedback is a little lacking. I was too lazy to make checkboxes so I used toggle buttons instead.
They're toggled when they're dark, and untoggled when they're light:
In future updates I'll probably switch those over to check boxes to remove any ambiguity.