1. go to your serverfiles/accountserver folder, open a file called gameserver.dat and you will see this "600 1 127.0.0.1 test test account" as you see there is a number 600 you can chnage that to what ever you want...but it has to be a higher number than 600 600 is the current limit that can logg into your server.
2.serverfiles/gameserver folder, open a file called gameserver.cfg and you will see this "600 600 600 600 600 600 600 1 127.0.0.1 test test my" as you can se there is a lot of numbers of 600 you have to chnage all of them to a number you set in account server files.