/admin/manage_users.php not found

[4tux]

ok thats the point.
But now i get an error 500 when i change from the admin to a reseller or user.

And when i try to change the settings from an reseller i recieve the message that the datas are inconsistent. What can i do?

[Thu Dec 03 14:09:28 2009] [error] [client 79.229.205.42] Premature end of script headers: change_user_interface.php, referer: http://admin.4tux.de/admin/manage_users.php
[Thu Dec 03 14:09:30 2009] [notice] mod_fcgid: process 26135 going graceful shutdown, sending SIGTERM
[Thu Dec 03 14:09:36 2009] [notice] mod_fcgid: process /var/www/ispcp/gui/index.php(26135) exit(communication error), terminated by calling exit(), return code: 0