admin change..

How about this, currently im using astguiclient 2.0.5 now and i got default username and pass on my admin webpage interface 6666 & 1234
is it possible to add another username and password to login with minimal privileges.I tried to add in the users but when i tried it on the login page its not wokring. how do i set it?
And also i would like to change the admin default username=> 6666 pass=> 1234
is it possible to add another username and password to login with minimal privileges.I tried to add in the users but when i tried it on the login page its not wokring. how do i set it?
And also i would like to change the admin default username=> 6666 pass=> 1234