创建类别获取错误"无法为未定义的类定义类别"

I am facing a problem when i try to create 2 category of my OWN Simple Class ( Class name is Car). I created 2 Category for this class just for testing " Car+show.h" & "Car+Protected.h". I Just write very small methods in to all like NSLog something sting. I am facing a problem when i try to create 2