Any tips on LDAP debugging of Apache authentication are much appreciated. I suspect either AuthLDAPURL or AuthLDAPBindDN are incorrect.

I can successfully connect to ldap://email.mydomain.com:389 using credentials for svnadmin<AT>mydomain.com and browse the LDAP folders using Softerra LDAP Administrator.

1 - When I go to htttp://localhost/websvn/ I login with:
User name: myEmail<AT>mydomain.com
Password: mySecretPassword
2 - After login attempt, the following is appended to the Apache error_log:
[Tue Apr 24 08:07:38 2012] [error] [client 127.0.0.1] user myEmail<AT>mydomain.com: authentication failure for "/websvn/": Password Mismatch
3 - Pressing Cancel button displays Authorization Required page

File: websvn.conf
Alias /websvn/ "/opt/lampstack-5.3.10-1/apps/websvn/htdocs/"
Alias /websvn "/opt/lampstack-5.3.10-1/apps/websvn/htdocs"
<Directory "/opt/lampstack-5.3.10-1/apps/websvn/htdocs">
Options Indexes MultiViews
AllowOverride None
Order allow,deny
Allow from all
AuthType Basic
AuthName "Enter FES email address & password"
AuthBasicProvider ldap
AuthzLDAPAuthoritative off
AuthLDAPURL "ldap://email.mydomain.com:389/DC=mydomain,DC=com?mail"
AuthLDAPBindDN "mail=svnadmin<AT>mydomain.com,DC=mydomain,DC= com"
AuthLDAPBindPassword admin12
require valid-user
</Directory>

Apache (Linux CentOS 5.2): 2.2.22
WebSVN :2.3.3

Note: Forum disallows URL or email address posting for noobs so I had to use htttp and <AT> as a work-around.