Error While Creating a User in NAV 2013

Hi All,

While i am trying to create User in NAV 2013,I have Created 1st User and in the Permission Details i have assigned the Permission as SUPER. I am getting a Error “You must assign at least one user the SUPER permission set and configure that user to log in with authentication type ‘Windows’, which is supported by the current server instance” and it creates the User in User List with out Permission and when run the RTC again give this error “You are not authorized to sign in. Verify that you are using valid credentials and that you have been set up as a user in Microsoft Dynamics NAV”

I am confused what extractly going wrong or i am missing any steps.

Following link might help you.