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:// using credentials for svnadmin<AT> and browse the LDAP folders using Softerra LDAP Administrator.

1 - When I go to htttp://localhost/websvn/ I login with:
User name: myEmail<AT>
Password: mySecretPassword
2 - After login attempt, the following is appended to the Apache error_log:
[Tue Apr 24 08:07:38 2012] [error] [client] user myEmail<AT> 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://,DC=com?mail"
AuthLDAPBindDN "mail=svnadmin<AT>,DC=mydomain,DC= com"
AuthLDAPBindPassword admin12
require valid-user

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.