can't log in to Parental Control

I see that this has been rehashed over and over, but I don't see a solution (other than no solution for some devices because Netgear doesn't want to fix it for them).

I have an N7000.  I've logged in to it as admin to allow devices to connect to wireless.  That's about it.  Now I want to use parental controls.  I've installed that and tried to log in to it.  It pops it with "admin" as the user name.  That's the name I still use to access the router config.  Of course, I at least changed the password.  I logged in to the router admin earlier today.  So, I assumed that login was the one the parental control wanted.  Couldn't get in.  Password is written down and I tried several times.  Reading here, I tried the login I created to access this forum.  Also no good.  I'm unclear -- which login should I use?  If one of these (don't know what else it could be) and I still can't get it to work then I'd appreciate recommendations for other software to use for access control.  I have Norton Security; haven't looked into whether that can do it or I'd need some other Norton component.

Secondary question:  it appears that I had to sign up for a 14 day trial of Cisco Umbrella in order to be able to write to this forum.  Is that really true?  Will I need to get the trial again if I want to post after the 14 days.