Setup error - Could not find the Install Test Versioner class

Hi, I’m getting this error message when trying to install revolution with a custom core location:

"FATAL ERROR: MODx Setup cannot continue.
Could not find the Install Test Versioner class at: /home/webuser/public_html/setup/includes/checks/modinstalltestmodx_setup_key.class.php
Please make sure you’ve uploaded all the necessary files."

The setup process works fine until I get to the Context Installation screen. Once I click next on this screen, I get the error message.

My core files are located at /home/modx/core/, with user/group ’modx’.
All other modx files are at /home/webuser/public_html/, with user/group ’webuser’. webuser is a member of the modx group.

I’ve changed the MODX_CORE_PATH to ’/home/modx/core/’ in all the config.core.php files.

I’m pretty sure the error has something to do with the core being in a different location and/or with the file permissions, as I’ve been able to install revolution successfully with the core in the standard location, but I could be wrong!

here’s my server info:
CentOS Linux 5.4
Apache 2.2.3
MySQL Server 5.0.77
PHP 5.2.10, running with FastCGI, with mysql 5.0.77 and pdo_mysql 5.0.77

I have full control over the server (using the Rackspace cloud).

any ideas? I’m not sure what to check at this point, but I’d really like to get this set up so that I can have one core installation for all my sites.

thanks!

Did you physically move the core? If not, try that.

Check the settings in core/config/config.inc.php, especially the MODX_PROCESSORS_PATH settings

There are four config.core.php files. Did you get them all?