Change the map

i trying change when i join the server i want no go to loby but to other map like characters selection when i chose the character its and click to play its send to ThirdPersonExampleMap
its send-me every time to the loby
but i cant make it work

i change all World->ServerTravel("/Game/Assets/Maps/Lobby?listen"); to map i want but not sucess in this files

problem solve
i have rebuild my engine