Created war for play-2.5.12 does not contain my application class files.

[amanraj09]

I followed the document to create war using play2war plugin. But in war file all i get is lib directory.
I am not seeing my application classes.

What am I missing?
I used following configuration

----- in build.sbt----

import com.github.play2war.plugin._
version := "1.0-SNAPSHOT"

Play2WarPlugin.play2WarSettings
Play2WarKeys.servletVersion := "3.1"

---

------------in plugins.sbt---------------
addSbtPlugin("com.github.play2war" % "play2-war-plugin" % "1.4-beta1")