Originally Posted by Viper-666

You can't just copy the transponders like that. You can easily check whether the valet key contains a transponder. Wrap 5 layers of aluminum foil around the black part and try to start the Crossfire.
If it runs, you have no more Skreem and should look at the ECU.
As far as I know only Precision ECU makes an immobilizer delete. They seal the ECU afterwards so you should be able to see that.