Question about Upload rar files

[eluser]Aimadj[/eluser]
hi all
I'm use the Upload library to upload files but I'm need to allow the rar files but if i upload rar files the process give me this error : The filetype you are attempting to upload is not allowed.

I'm tray to add rar files to the mimes config file with this link :

Code:

'rar'   =>  array('application/x-rar-compressed', 'Archive WinRAR/rar', 'Archive WinRAR', 'application/rar')

but with this all time the error is appear :-S .

tks for all to help me