above issue has been resolved.....
under CentOS --Open terminal and put the following comments to delete the admin account and assign the new password to default "Administrator" account .
((Log into the postgres database by entering the following command

)
psql -U eware -h localhost
eware
((Navigate to table containing users by entering the following command

)
select * from users;
((delete the user “Administrator” by doing the following commands

)
delete from users
where userid = 1;
Open a Web Browser, and go to the IP Office Application Server Web Control page.
Log in as an Administrator and stop the Contact Recorder service.
Once stopped, start the Contact Recorder service again.
login to Contact Recorder , then assign new password..