upload ci from local to webserver

[eluser]Unknown[/eluser]
hi , please help me ,
i when upload my ci folder to my ftp on internet ,ci not work ,
show to me error http500 .
this ci work on my local but on webserver not work,

[eluser]kreamik[/eluser]
what about the file permission?

activate 'development' while you debug what error happened .