Unable to receive Push notifications to Notifications Tray on Appcelerator Android - push-notification

Question

I have been trying to get Push notifications working for an android application. When the app is focussed, the push is received just fine. However, when the application is in the background, i see an error in the log.
My code is -
var CloudPush = require('ti.cloudpush');
CloudPush.retrieveDeviceToken({
success: function deviceTokenSuccess(e) {
console.log('Device Token: ' + e.deviceToken);
token = e.deviceToken;
that.token=token;
},
error: function deviceTokenError(e) {
console.log('Token Error: ' + e.error);
}
});
CloudPush.debug = true;
CloudPush.focusAppOnPush = false;
CloudPush.enabled = true;
// CloudPush.showAppOnTrayClick = false;
CloudPush.showTrayNotification = true;
// CloudPush.singleCallback = true;
CloudPush.addEventListener('callback', function(evt){
alert('A push notification was received!');
console.log('A push notification was received!' + JSON.stringify(evt));
});
CloudPush.addEventListener('trayClickLaunchedApp', function(evt){
alert('A push notification was received - onLaunched');
console.log('A push notification was received!' + JSON.stringify(evt));
});
CloudPush.addEventListener('trayClickFocusedApp', function(evt){
alert('A push notification was received - onFocused');
console.log('A push notification was received!' + JSON.stringify(evt));
});
and the error i am receiving is -
07-18 14:19:44.853: E/TiApplication(25319): (main) [9,46101] Sending event: exception on thread: main msg:java.lang.RuntimeException: Unable to start receiver ti.cloudpush.GCMReceiver: java.lang.NullPointerException; Titanium 3.2.3,2014/04/22 10:17,b958a70
07-18 14:19:44.853: E/TiApplication(25319): java.lang.RuntimeException: Unable to start receiver ti.cloudpush.GCMReceiver: java.lang.NullPointerException
Any thoughts on how i could work this out is highly appreciated.
Im using Titanium SDK - 3.2.3 GA.