[Tue Sep 21 12:34:13 2010][Notice][Kernel::System::Auth::LDAP::Auth] User: vwalsh (CN=Vance Walsh,OU=Adults,DC=public,DC=concordacademy,DC=org) authentication failed: '80090308: LdapErr: DSID-0C090334, comment: AcceptSecurityContext error, data 52e, vece ' (REMOTE_ADDR: 127.0.0.1).

[Tue Sep 21 12:34:13 2010][Error][Kernel::System::User::UserLookup][737] No UserID found for 'vwalsh'!

Where should I be looking to resolve this?