top.php contains hardcoded path in line 39:
require("/usr/share/pear/Mail.php");
On Debian GNU/Linux PEAR installed in /usr/share/php.
So kamparealis won't work, while you change this path
by hand.
May be better way, will be to leave relative file name
there and use standard include_path or to add something
like PEAR_PATH variable to config.php?