android client -server communication server doesn't receive message

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http://stackoverflow.com – I am just started to learn android&java. Now i am trying to estabilish simple udp connection between android and pc. but it looks that my server doesn't receive messages from android; the one line it wrote in console listening to the port... and then nothing happens. firstly i ran server code in neatbeans, than i ran my client in android emulator. Help wanted! client: package com.asd.soed; import android.os.Bundle; import android.app.Activity; import android.view.Menu; import android.view.View; import android.widget.Button; public class MainActivity extends (HowTos)