SAP BusinessObjects XI 3.2 and AD authentication

System: BusinessObjects XI 3.1 with tomcat as back-end web-server, also with crystal reports 2008. Database on oracle platform.

We recently deployed a new domain controller running windows server 2008 r2 and currently in the process decommissioning the old DC server which is running windows 2003 r2.

The problem is when we changed the config file(krb5.ini) to point to new server, and then tried to login to business object i get the below error...

Account Information Not Recognized: Active Directory Authentication failed to log you on. Please contact your system administrator to make sure you are a member of a valid mapped group and try again. If you are not a member of the default domain, enter your user name as UserName@DNS_DomainName, and then try again. (FWM 00006)

What need to be changed in order for it work on 2008 r2 domain controller? really appreciate your help