Nokia 5700 express music
Twisting problem

I have nokia 5700!

but i am having twisting problem

actually when i twist right half, means to open the the camera for using 3g calls, it opens music player, instead of opening the 3g calls camera, and when i twist back it opens the camera, and when i twist left to open the camera, it opens nothing, nothing happens,

can ny one help me out from this promblem,

my email adress is: [email protected]