I can not help you with AdminMap because I have not used it. But I do know that BF2CC, which I agree is crappy, will not work properly when
.Net Framework 1.1 is not installed on the system that BF2CC is running on.
When I use the AdminMap, I also get the message "IP not valid for this registration"
I tried renaming the reg.ini and starting up AdminMap again and I get prompted with a registration form but I belive that the form is no more working as the backend is not available anymore. How could I proceed without the registration?