1996 Crown Victoria brake lights

Ok. So I was having this problem where my car wouldnt switch from park to reverse. We took care of the switch thing on the brake pedel. Everything was great for a week. Now im not having any problem switching my car out of gear but once my car goes into drive, or reverse the brake lights will not work. They only work when the car is in park.I do not have any lights that are out. Can someone please help me.
thanks
bobbi :)