PLEASE HELP!!! DASH CLUSTER

hey there i hope sum one can help me out i recently had my car broken into and they stole my cluster my stereo and my seats. Anyways i bought a cluster for 120 bucks off sum guy who had crashed his. My mustang is a v6
2002 3.8l i installed the cluster and the car wont turn on. The cluster's theft light on blinks rapidly when i got to turn on the car. Any body with any idea of how to fix??? thanks.

well when i hook it up it acts normal it does display the mileage. just when u go turn it on it just cranks. cant believe they stole my dash. so iam guessing who ever has it is in the same place as i. cause i bet they cant use it. also i install a 03 cobra hood on my mustang and on the right side (passenger side) it doesnt seem to close all the way if u look at the car from the front it looks like its hitting sumthing. but its NOT>? anybody know why