Button URL problem

Hi, I have a small movie with several animated buttons. I had to change the url’s in the buttons. I made the changes, saved the fla and exported the movie, and published to web, but the the links insist on going to the old address. Sometimes if I hit refresh in the browser it will be ok, but it’s not permanent. It’s driving me crazy!! Even if I remove the url completely it will go to old address also in preview mode within Flash! Thanks