what server are you using?
If you are using arc then you will need to add your portal to the IFO and STB files
If you are using osrose then you need to also add it to the warpgates database table as that's where the server loads them from.
iwith osrose, if you don't have a valid telegate in server memory then when it receives the warp request from the client it will compare your current position with known telegates and conclude that there are none near you so you must be attempting to use packet hacking. It will then unceremoniously lock up your client. It won't boot you out but all controls will become unresponsive. That's deliberate coding in the server.