I need some help creating a spotlight to act like a search light. I have a spotlight parented to an aircraft which is moving along a motion path but i need the aim of the spotlight to remain focused on an object on the ground while the plane flys by. Anyone help?

Even better would be to contrain the aim to a locator and be able to animate the locator. Tried using Constrain/Aim but it's just not working.

Edit: Fixed.