PHP Timeclock

I have as many as 50 people access this PHP Timeclock system. We have had
a reoccurring problem of where the software does not load consistently.

Page comes up either:
1) Blank with a white page.
2) With some type of configuration screen that shows a menu with Apple
Talk, NetBeui, NetWare, SNTP, TCP/IP, etc.
3) A timeout.

I have restarted the server, as well as restarted the httpd service. I am
unable to determine what is causing this so erratically.

We have timeclock.mydomain.com as a virtual server pointing to the PHP
directory.

The system is a CentOS 5.0 server with all updates. RPM packages version
are as follows:

httpd-2.2.3-7.el5.centos

mysql-5.0.22-2.1
mysql-server-5.0.22-2.1

php-mysql-5.1.6-12.el5
php-5.1.6-12.el5
php-common-5.1.6-12.el5
php-cli-5.1.6-12.el5
php-mbstring-5.1.6-12.el5
php-ldap-5.1.6-12.el5