Interface username and Interface password is not working as expected in the access restrictions section.

Interface username and Interface password is not working as expected in the access restrictions section.

hello there,
I am  trying to give a specific user the access of the safesquid interface.
in the access restrictions section , i have mentioned the user in the LDAP profiles and i am tring to give the access of safesquid interface to that user. when i enter the username and password in interface username and interface password columns and then save it its not working. its not prompting the user to enter the username and password when he/she access safesquid.cfg. what could be the issue?