I installed All In One WP Security & Firewall and it broke

I installed All In One WP Security & Firewall and it broke my site. The front page is blank and when I go to a sub page or one of my sites, I get this error message: [an error occurred while processing this directive]. And it's the same exact thing as http://blogs.goerie.com/404.shtml. I deactivated and removed the plugin with no luck. I can access the dashboard for the network, main site and sub sites just fine. I can also access .html files in my browser just fine.

My main site URL is http://blogs.goerie.com.