we are implimenting SSO for Oracle EBS 220.127.116.11 on 11gR2 database. First we implimented in our Development environment. SSO was working fine. Then we refreshed our Development environment with our UAT/QA environment which does not have SSO on it.
Then we deregistered SSO with Dev environment and registered again. The registration was successfull. But when we try to login to Dev environment it was giving an error "The Single Sign-On server registration is invalid. Please contact the System Administrator." Then we tried to follow the metalink note 434752.1 but no use.
Can you please let us know how you resolved this issue? I mean How did you clone your App node?