Google all in one SEO

I tried installing this plugin but I got the following error message. I have tried deactivating it, but even this doesn't seem to work anymore. Any ideas?

Warning: include_once(/home/financeo/public_html/blogs/wp-content/plugins/all-in-one-seo-pack/) [function.include-once]: failed to open stream: Success in /home/financeo/public_html/blogs/wp-settings.php on line 582

Warning: include_once() [function.include]: Failed opening '/home/financeo/public_html/blogs/wp-content/plugins/all-in-one-seo-pack/' for inclusion (include_path='.:disappointed:usr/lib/php:disappointed:usr/local/lib/php') in /home/financeo/public_html/blogs/wp-settings.php on line 582