Sometimes when i do something in the webbrowser admin the httpd shut down. This time i was resetting a password..

error_log:
[root@linux02 /root]# tail /var/log/httpd/error_log
[Fri Jan 4 14:34:42 2002] [notice] SIGUSR1 received. Doing graceful restart
[Fri Jan 4 14:34:42 2002] [notice] Apache/1.3.19 (Unix) (Red-Hat/Linux) mod_ssl/2.8.1 OpenSSL/0.9.6 PHP/4.0.4pl1 configured -- resuming normal operations
[Fri Jan 4 14:34:42 2002] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
[Fri Jan 4 14:36:13 2002] [notice] caught SIGTERM, shutting down
[Fri Jan 4 14:36:16 2002] [notice] Apache/1.3.19 (Unix) (Red-Hat/Linux) mod_ssl/2.8.1 OpenSSL/0.9.6 PHP/4.0.4pl1 configured -- resuming normal operations
[Fri Jan 4 14:36:16 2002] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
[Fri Jan 4 14:37:09 2002] [error] [client 212.242.149.68] File does not exist: /home/e-smith/files/ibays/netdex/html/downloads.php
[Fri Jan 4 14:39:04 2002] [notice] SIGUSR1 received. Doing graceful restart
[Fri Jan 4 14:40:44 2002] [notice] Apache/1.3.19 (Unix) (Red-Hat/Linux) mod_ssl/2.8.1 OpenSSL/0.9.6 PHP/4.0.4pl1 configured -- resuming normal operations
[Fri Jan 4 14:40:44 2002] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
As i can see it is SIGTERM that is fucking ?? But wat is SIGTERM ?? And how can i fix that ?
Please help me.
Daniel Bahl
Denmark