Mafyoo

on wednesday i changed the stereo in my car. what i had in there before was the usual citroen one that had been in there from the beginning. WHen i exit the car i can lock the door with the key and open it. If i leave it more than 10 minutes i cant open the doors with the key, i have to manually open the door through the lock. Once im in, i notice the central locking button on the dasboard is lit and the cruise control button is lit. Also, its done things like make the clock stop working on the dashboard. what do i do?