Access Forbidden On A 777 Folder

I am a newbie.

I am trying to install yii framework on my linux system. I am running Mandriva 2010. I have searched the net and I cannot find any tutorial or help on how to do this. Please can someone guide me? I have downloaded and extracted the files.

I have copied the folder to my web root but I cannot access the folder from a browser as it tells me access forbidden and I made the permissions 777 on the directory.

Help will be greatly appreciated