How do I use the Smart Defender player weapon in Madden 09?

How do I use the Smart Defender or "Light Bulb" player weapon? I know that I sould be able to see some of the other players play but I dont know how to use it. How does it work?|||You can't use it. How it works is, if it's the QB that's smart then if the defense runs the same plays over and over, then the light bulb with fill up with each recognized play. If it's a defender with the bulb then the more frequently the QB calls the same plays, their bulb will fill up. Now, seeing plays run consecutively on either side fills up the light bulb more rapidly.