99 Voyager (3.3) Brake light stays on

Thanx for the replies on the other thread yall. Another question, my brake light (on the dash, the "there's a problem light" )has been on for at least a year. We have changed the brakes and the light doesnt go off. It came on around 75k miles, I know they had a problem with the airbag light coming on at 75k miles so I dont know if this is something like that or not? Anyone have any suggestions?

Rachel