403 Forbidden

I’m able to upload fine, but when I click the link to access the file, I get the following 403 Forbidden Error: Permissions on the user_uploads folder is set to 777. thanks

Forbidden
You don’t have permission to access /files/wp-content/uploads/user_uploads/coatsandclark/Document2.pdf on this server.

http://ww.wp.xz.cn/extend/plugins/nmedia-user-file-uploader/