What problem do you have? Do you see it getting
RADIUS accounting requests? Enable debugging on NxFilter side and then send some RADIUS signals first. You can test it using
NTRadPing tool.
And it's normal for it takes several seconds to login your users with RADIUS accounting signal as your RADIUS servers sends it after your user logged in. So, we suggest yout to have a default user for your network. Do you have a default user?