guys can you please tell me what causes this error... thanks... Notice: Undefined index: imp in /usr/local/apache/htdocs/horde/lib/Registry.php on line 626 Warning: Cannot add header information - headers already sent by (output started at /usr/local/apache/htdocs/horde/lib/Registry.php:626) in /usr/local/apache/htdocs/horde/imp/lib/base.php on line 65