My lights won't aim properly
 

For some reason when I select my rocket ship (following Mastering Maya 2) and then shift+select my spot light and then choose Constrain-->Aim, my light does not follow my ship. Instead the light is locked on to some distant unkown point, and moves unwantedly when the ship moves. How do I fix this problem. I am experincing them same difficulty with cameras. I am using Maya 4.5 unlimited.

Heres what I do. Make a light with an Aim to begin with. Put your Aim inside the ship, so the light shines on it. Then set the Aim at 0. Move it where you want it, and set it on that frame.