not compatible with fbconnect

I have fbconnect installed on my drupal website and on installing this module and enabling openinviter importer engine I get the following error.

Fatal error: Cannot redeclare class Facebook in /var/www/mysite.com/sites/all/modules/fbconnect/facebook-client/facebook.php on line 37

This made the site inaccessible and I had to disable fbconnect from the database to access it again.