Crowdness - 2005-09-12

I get the following error when I try to access my phpwiki index.php:

Fatal error: Cannot redeclare class unchangeable_variable in C:\Program Files\Apache Group\Apache2\htdocs\phpwiki\configurator.php on line 1951

This is my environment:
php-5.0.5
mysql4.1.14-win32
Windows 2000 5.00.2195 SP4
Apache_2.0.54-win32-x86-no_ssl
phpwiki-1.3.11

Can anyone point me in the right direction to try to resolve my problem?

The mySQL tables are created, the user is created, but I'm not sure what this error is related to.

Thanks