If you're having problems with your site not loading properly after activating CTR Theme, it's because you're running an outdated version of WordPress. Upgrading to 3.0 or higher will solve the problem.
If you find that you can't access your WP admin section as well, just delete the CTR Theme files from the server. When you revisit the site, it should disable CTR Theme automatically, at which point full functionality will be restored. Upgrade your installation of WordPress to 3.0 or higher and reinstall CTR Theme.