Broken Theme

Just recently on my blog: http://lilwaynehq.com/blog my theme just stopped working. I went to edit it in the dashboard, then when i was on the themes page, I got this error:

The following themes are installed but incomplete. Themes must have a stylesheet and a template.

WP_Premium/style.css – File not readable.

I don’t know how to fix it as the permissions seem fine in the CPanel

Please help, thanks