MapView not working

Hi All,

When I load my MapView application, the MapView only displays the grey grid lines.

Here is my Code:

main.xml:

<?xml version="1.0" encoding="utf-8"?>

Manifest File:

<?xml version="1.0" encoding="utf-8"?>

Activity:

package com.andoid.googlemaps;

import android.os.Bundle;

import com.google.android.maps.MapActivity;
import com.google.android.maps.MapView;

public class GMapsActivity extends MapActivity {
private MapView mapView;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

/* Proxy Settings*/
System.setProperty("http.proxySet", "true");
System.setProperty("http.proxyHost", "proxy.example.com");
System.setProperty("http.proxyPort", "8080");

setContentView(R.layout.main);
mapView=(MapView)findViewById(R.id.map_view);
mapView.setBuiltInZoomControls(true);

}

@Override
protected boolean isRouteDisplayed() {
return false;
}
}

Thanks in advance for any help...