codeigniter 404 - 找不到文件或目录。 在实时服务器上

I'm working on php Codeigniter project. after testing offline it was working fine, when i uploaded it to live server only home page working and i think it's working from $route['default_controller'] = "home"; but i have tried to access any of my controllers even home controller. i have made all my controllers' first letters upper case letters, and it didn't working too. and i always got ## 404 - File or directory not found ## , when i call any controller.

Your controller name and the class name must be same and first letter should be uppercase and rest of the letter should be lowercase