How to rebuild logshipping after role change

Hi ,
I am working on logshipping DRS trail and have done role successfully.
Now after doing the role change I want to rebuild the logshipping for database which is already existing in secondary server.
I tried adding destination server with existing database. It gives me message as " The database is not in standbymode to do logshipping". Can anyone help me on this.
How should I bring the existing database in warm standby mode.

Thanks
Md.S.HassanYou will have to restore the database on the secondary ensuring that you specify NORECOVERY. Then add the logs (again with NORECOVERY) until you are current.