PHP 4.2.1 is installed as a cgi module on a Windows 2000 Server machine with an 800 Mhz Intel Pentium III processor using IIS 5.

When I configure the php.ini file to activate the extension module "php_ctype.dll" to use for error checking in my scripts, everything seems to work until it is necessary to reboot the system. Upon attempting to reboot, the system stops with the following message:
WARNING
ctype: Unable to initialize module
Module compiled with debug=0, thread-safety=1 module API = 20020429
PHP compiled with debug=0, thread-safety=1 module API = 20010901
These options need to match.

followed by:
SERVICE CONTROL MANAGER
At least one service or driver failed
during system startup.  Use Event Viewer
to examine the event log for details.

After clicking "OK" to both of these messages, the system finishes rebooting and seems to work. But this causes a problem when rebooting remotely since the system hangs until someone is physically able to click through these messages at the server site.

When I go back and comment out the line:
"extension=php_ctype.dll" in the php.ini file, the messages cease.

I have another system running Windows 98 2nd Ed. with a 500 Mhz AMD K6-2 processor using PWS 4 with PHP 4.2.1 set up the same way. With the php_ctype.dll module activated in php.ini, I do not receive any messages upon reboot and the module seems to work correctly.

Why do files from the same archive (php-4.2.1-Win32.zip) give this message/problem on the Win2000 Server?