ford 6000 cd player?

I have a problem with my ford 6000 cd player, i have just purchased the car from the car market and the security panel was missing from the stereo,i purchased one from ebay and when i put it on the stereo came on okay the cd came on but i cant switch it off and none of the other buttons work or the stoke on the steering coloum, i don't know what to do next.