1998 Mazda MPV sport 4X4 134,000 MILES

:x I HAVE A 98 MAZDA MPV THAT WAS RUNNING GOOD UP UNTILL 3 DAYS AGO, MY HUSBAND ACTIVATED THE 4WH DR AND I TURNED IT OFF ACCIDENTALLY WHILE DRIVING IT, NOW THE 4WHL DR IS STUCK AND WON'T DISENGAGE, IT MAKES A LOUD CLANKING NOISE EVERY TIME I TAKE A TURN, WE TRIED TO TAKE IT OFF THE 4WHL DR BUT IT REFUSES TO BUDGE ON THE 2WH DR. WHAT CAN WE DO AND A BOUT HOW MUCH WILL IT COST TO FIX THIS PROBLEM? :Oops: