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java.net.ConnectException: Connection refused	at java.net.PlainSocketImpl.socketConnect(Native Method)	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:334)	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:196)	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:178)	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:356)	at java.net.Socket.connect(Socket.java:605)	at com.android.okhttp.internal.Platform.connectSocket(Platform.java:113)	at com.android.okhttp.Connection.connectSocket(Connection.java:196)	at com.android.okhttp.Connection.connect(Connection.java:172)	at com.android.okhttp.Connection.connectAndSetOwner(Connection.java:367)	at com.android.okhttp.OkHttpClient$1.connectAndSetOwner(OkHttpClient.java:130)	at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:329)	at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:246)	at com.android.okhttp.internal.huc.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:457)	at com.android.okhttp.internal.huc.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:126)	at org.ksoap2.transport.ServiceConnectionSE.connect(ServiceConnectionSE.java:46)	at org.ksoap2.transport.HttpTransportSE.call(HttpTransportSE.java:68)	at mobile.shinam.com.studentco.LoginActivity.callPHPWebServiceForAuthenticate(LoginActivity.java:138)	at mobile.shinam.com.studentco.LoginActivity.wsAuthenticate(LoginActivity.java:70)	at mobile.shinam.com.studentco.LoginActivity.access$000(LoginActivity.java:24)	at mobile.shinam.com.studentco.LoginActivity$1.onClick(LoginActivity.java:55)	at android.view.View.performClick(View.java:5637)	at android.view.View$PerformClick.run(View.java:22429)	at android.os.Handler.handleCallback(Handler.java:751)	at android.os.Handler.dispatchMessage(Handler.java:95)	at android.os.Looper.loop(Looper.java:154)	at android.app.ActivityThread.main(ActivityThread.java:6119)	at java.lang.reflect.Method.invoke(Native Method)	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)