Ignition wiring problem

i recently put a rebuilt engine in and just got it started, i can get my car started but when i turn the key ignition off it keeps running, i have to go to the engine bay and unplug the relay or conk out to turn it off... im guessing its probably somthing wrong with the set up of the wiring (obviously)..... has this happend to anyone??? what could be the problem?

Thanks
 
There is a FREE recall on Ford ignition switches. They overheat and sometimes catch fire.

Copy down you VIN number and call the Ford dealer nearest you. Tell them you want to see if the ignition switch recall for Fords & Mustangs was done on your car. They will ask for the VIN number & check it against the master database. If it isn't in the datbase, then you can schedule an appointment to have the switch replaced for free. The TSB is #95S28, and don't let them tell you that they don't do that anymore...