Cannot get LDAP authentication to work on CentOS 6.5

I have what look to be the correct settings for Active Directory, but no joy. Settings are as follows:

Server Settings=napanet.net

Admin Console Port=9090

Secure Admin Console Port=9091

Property Encryption via AES

Database Settings:

Driver=org.postgresql.Driver

DriverURL=jdbc:postgresql://shrike.napanet.net:5432/openfire

Username=Openfire

Password=************

LDAP SERVER:

Server Type: Active Directory

Host:shrike.napanet.net

Base DN:CN=Users,DC=napanet,DC=net

Authentication DN:CN=Administrator,CN=Users,DC=shrike,DC=napanet,DC=net

Password:**************

User Mapping

Username Field: sAMAccountName

Group Mapping

Group Field:=ou=OpenfireUsers

Member Field:=member

Description Field:=description

Add Administrator:=administrator

ERROR “No username was provided or the specified username was not found.”

Try delete the following string in Openfire.xml

"

database.defaultProvider.username

database.defaultProvider.password

ldap.adminDN

ldap.adminPassword

clearspace.uri

clearspace.sharedSecret

"