buddypress upgrade problem

HI. I just did an automatic upgrade for the buddypress plugin. the process wasn't finished and in the middle of the process reverted to the plugin page: http://gransar.net/learning/wp-admin/plugins.php. everything including the main site goes to that page which is not loading and cannot be opened by the browser. I downloaded the latest version of buddypress and copied it manually (overwrite). It is not working. I also renamed buddypress folder and still no luck. I cannot access admin page or anything with the main blog.