"Your CD key is still in use" Error, Multiplayer server

[Legacy_Killhappyfool]

               I keep getting the Your CD key is still in use, I am the only one with my CD key it has never been givin out though it has been installed on several computers, though only one has ever been working at any time. It happens sporadically and often for several hours. I have NWN Diamond version completely updated, the override file is renamed to remove some problems with missing heads on some of the servers I play on, other then that I have no idea what is causing this problem. I am hoping someone has a solution.
               
               

               
            

[Legacy_HipMaestro]

               A rather lengthy discussion of this problem on the legacy boards

Use the Search utility on the legacy boards to find other threads (The above thread was only the first one I found).  This is a common problem.

Essentially, it appears that, in many cases, the problem is related to the specific server policy for resetting keys.  There are also some firewall and security issues that can be adjusted within your OS (i.e. Windows firewall settings).

If there is a forum available associated with the server which you are having problems, that may be the best recourse to alert those which are responsible for maintaining that server.

Does this problem occur on every server you try?  If so, try several others.  If you can find servers where the CD key authentication works reliably, at least you are in a position to identify the offenders. If it happens on EVERY server, the problem most likely lies within your firewall, router or security settings.

Just my two cents...

Good luck resolving this!