[Play 2.5.x-Java] Problem with play.ws.timeout.idle

Hi everyone,
I am using Play 2.5.x and I have a problem to set play.ws.timeout.idle in the application.conf or PlayKeys.devSettings := Seq("play.server.http.idleTimeout" -> "120s") in build.sbt.

I make a request which takes a long time to obtain the response, so I must increment the idle time to avoid to obtain twice requests.

How can I solve?

Thank you,