Fps controller script error

How do i make the fps controller work, at the moment, all it is saying is that the associated script cannot be loaded. please fix any compile errors and assign a valid script. I dont know whats happening, all i am annoyed at it that i cant do jack and the funny thing is, this is the first time this has happened, i am getting really angry with it and i even uninstalled it and re-installed it!!! If you can help, please can you tell me before i throw the damn thing out of the window!!!!!!!