You will be able to enter to the admin panel if you will rename wp-content/plugins to wp-content/plugins_. This will disable all plugins for a while and you will be able to enable them again manually. Then you should rename this folder to the content/plugins back. Also you may enable wp-dubug option to see the multiple error messages from plugins. You may try to disable/repair plugin files and check with your host other(php,.htacces, etc.) including security settings.
Also try to use this link http://maroufl.com/wp-admin/ to access admin panel instead of http://maroufl.com/admin/
