2003 Mazda 6 third brake light

I bought a new third brake light for my Mazda 6.The light goes in the spoiler or wing if you will.Its held in by four machine screws thru four tabs on the light.When I remove the screws I get no movement at all from the light at all.I tried gently prying it but I get nowhere.I dont want to pry too hard as not to chip the paint.What am I doing wrong.Is the light glued in or is there something im missing.How do you get this thing out..thx