Deleted Variable in open level

Hi guys,
i am creating a multiplayer game, but i have a problem. i create a widget in which i set up servername,map name, number of players ecc…,but when i open level, the variable that say the server name is cancelled. How can i resolve this problem? maybe i have to save the variable? thanks for answer.

i risolved this problem , i created a parent of game instance and this blueprint created the variable server name. the last problem is that the variable is visibible only for server and not for client. someone know how risolve this little problem?