Hello, I have a problem when I want to connect to a TeamSpeak server.

For exemple, I need to connect to teamspeak1.mtxserv.fr:10038 but when I click on "connect", it write: "Trying to resolve hostname teamspeak1.mtxserv.fr" then "Trying to connect to server on teamspeak1.mtxserv.fr:10038" and after "Failed to connect to server" or "Error."

I don't know how to resolve the problem, please, can someone help me ?