I do not recommend using this files. They have many several bugs, some which can not be tolerated. That problem you have Offspring, has nothing to do with serial. It could be an IP mistake in the configuration files. I mean, do you get disconnected saying that there is another version available, or you just get disconnected normally? If this is the first case, it's really a serial mistake. Both client and server side must have the same serial and version, and you should use the correct software to edit this things. And if this is the second case, you should check the configuration files and everything like that. I don't know exactly what is going wrong, but I think it is a problem with Joinserver or Connectserver. Good luck!