LDAP Bind to AD Breaks With New Domain Controller

We are using LSF 9 on Windows with ADAM as our LDAP provider. We have the LDAPBIND set up (to Active Directory) and working correctly for Lawson single sign-on.  Our network team is currently updating our Active Directory infrastructure with new hardware that will eventually be able to run AD 2008.  In Lawson, I can successfully change the LDAPBIND to use one of the new domain controllers.  However, when we power off the old domain controller that was specified in our LDAPBIND, users are unable to log into Lawson.  They get an "incorrect user name/password" error. Does anyone know where the old domain controller information would be stored other than in the ldapbind?

Thanks.