Redmine

I'm trying to get Subversion to authenticate via the Redmine database using Apache and Perl. I can see from the mysql logs that the Perl Authentication Handler is querying the mysql database (so I assume therefore that my Apache config is correct), but the "Authorization required" message keeps popping up. I've tried via a web browser and with TortoiseSVN with the same result.

My Apache Subversion config is as follows:

<VirtualHost *:80>
ServerAdmin admin@projectcygnus.org
DocumentRoot /var/www/svn
ServerName svn.projectcygnus.org
ErrorLog logs/svn_log
CustomLog logs/svn-access_log common

PerlLoadModule Apache::Redmine

<Location />
                DAV svn
                SVNParentPath /opt/svn
                SVNListParentPath On
                Order deny,allow
                Deny from all
                Satisfy any

PerlAccessHandler Apache::Authn::Redmine::access_handler
                PerlAuthenHandler Apache::Authn::Redmine::authen_handler
                AuthType Basic
                AuthName redmine

#Read-only access
                <Limit GET PROPFIND OPTIONS REPORT>
                        Require valid-user
                        Allow from 127.0.0.1
                        Allow from 184.22.234.82
                        Satisfy any
                </Limit>

#Write access
                <LimitExcept GET PROPFIND OPTIONS REPORT>
                        Require valid-user
                </LimitExcept>

RedmineDSN "DBI:mysql:database=redmine;host=localhost:3306"

RedmineDbUser "redmine" 
                RedmineDbPass "witch123" 
        </Location>
</Virtualhost>

Ideally I'd like some way to log the Perl authentication handler to see what sort of response it is getting back from MySQL.

I am running Apache 2.2.3, Subversion 1.6.11, MySQL 5.0.77 and Redmine 1.1.3

Any ideas as to what is going on and how I might troubleshoot this? Thanks!