How do i remove a number plate light cover on my Peugeot?

I have a Peugeot 206cc and one of the rear number plates light bulbs has blown. I need to replace this before my car has its MOT but for the life of me i cant get the cover off the light. My manual just says remove the transparent cover unclipping each side with a small screw driver, i have tried this but it wont come off, has anyone done this before, is there a certain technique to getting the cover off.|||you need to push a small screwdriver up the ends and ease it down gently, one end at a time|||Sounds right to me,maybe you need to be a little bit more forcefull?|||U should b able to get at the bulb from inside the boot under the carpet