Hello, im trying to change the default port on my server (9987) to 9988, But teamspeak 3 wont let me =(

I've tried the command line to change the port, C:\Teamspeak\ts3server_win32.exe default_voice_port=9988 and restarted the server, but still doesn't work

i've even done the ts3server_win32.exe createinifile=1 and changed the port on there, saved...exited and restarted the server, still connecting on same port, ive check the ts3 info via query and it still shows using port 9987.

...I will even allow somone to connect to my server where the teamspeak server is being hosted at (under my supervision of course, and using Teamviewer)