[Users] Problem with OpenSER

Hi, I am new to OpenSER or SER and am having problems registering users to OpenSER. i had the Default user Admin registered to my softphone but am unable to register my other users.. i am using mysql with openSER.. i saw the difference between the admin user that i had default in Subsriber table and the user 'abc' that serctl added when i sed the command serctl add 'abc' 'abc' &#39;a(a)a.com&#39; <mailto:'a@a.com'> and i see the user added to the subscriber table with 1 difference.... The user abc is not having any value set for the confirmation field. Any help would be appreciated.. thanks krishna