Application nor run in the background

[Pramod P Deore]

I am developing one application in that when user dial '000' then some data (latutude,longitude) are sent to the server. But my application is not runing in the background. here is my code.

MyReceiver class contains code as

public class MyReceiver extends BroadcastReceiver
{

	@Override
	public void onReceive(Context context, Intent intent)
	{
		
			if (intent.getAction().equals(Intent.ACTION_NEW_OUTGOING_CALL))
	        {
				 /*String number = intent.getStringExtra(Intent.EXTRA_PHONE_NUMBER);
				 if (number.equals("000"))*/
				if (intent.getStringExtra(Intent.EXTRA_PHONE_NUMBER).equals("000"))
	     	   	 {
					
					Intent myStarterIntent = new Intent(context,PressingCameraKey.class); 
			           
			        myStarterIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 
			
			        context.startActivity(myStarterIntent); 
			       
	     	   	 }
	        }
		

	}

PressingCameraKey class contains

public class PressingCameraKey extends Activity 
{
	
	
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
       
        setContentView(R.layout.main);
      
        synchronized (this)
        { 
        		//moveTaskToBack(true); 
          		startService(new Intent(this, MyService.class));
          		stopService(new Intent(this, MyService.class));
          		finish();
          		
  		}	
       
    }
 
  

and MyService class contains

public class MyService extends Service
{
	LocationManager locationManager;
	String location_context;
	StringBuilder sb;
	String serviceProvider;
	GsmCellLocation location; 
	int cellID; 
	String var;
	DateFormat dateFormat;   
	long ms;
	
	double lat,lng,speed;
	String lat1,lng1,cellID1;

	@Override
	public IBinder onBind(Intent arg0)
	{
		// TODO Auto-generated method stub
		return null;
	} 
	
	public void onCreate(Intent intent, int startid)
	{
		super.onCreate();
	
    }   
	
	
	public void onStart(Intent intent, int startid)
	{
			
			super.onStart(intent, startid);
		
			location_context = Context.LOCATION_SERVICE;
		    locationManager = (LocationManager)getSystemService(location_context);
			
		    CalculateLatandLang();
		 
		    
		    onDestroy();
		
		 
	}
	
	public void onDestroy()
	{
		super.onDestroy();
		System.exit(0);
	}
	
	public void CalculateLatandLang()
    {
    	 sb = new StringBuilder("Enabled Providers:");
    	 List<String> providers = locationManager.getProviders(true);
    	 for (String provider : providers)
    	 {
    		 locationManager.requestLocationUpdates(provider, 1000, 0,new LocationListener()
    		 {
		    	 public void onLocationChanged(Location location) {}
		    	 public void onProviderDisabled(String provider){}
		    	 public void onProviderEnabled(String provider){}
		    	 public void onStatusChanged(String provider, int status,
		    	 Bundle extras){}
    		 });
    		 sb.append("\n").append(provider).append(":");
    		 Location location = locationManager.getLastKnownLocation(provider);
	    	 if (location != null)
	    	 {
	    		 lat = location.getLatitude();
	    		 lat1 = Double.toString(lat);
	    		 lng = location.getLongitude();
	    		 lng1 = Double.toString(lng);
	    		 sb.append(lat).append(",").append(lng);
	    	 }
	    	 else
	    	 {
	    		 sb.append("No Location");
	    	 }
    	 }
    	 
    	 TelephonyManager mTelephonyMgr = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE); 
    	 serviceProvider = mTelephonyMgr.getSimOperatorName();
    	 location = (GsmCellLocation) mTelephonyMgr.getCellLocation();
    	 cellID = location.getCid();
    	 cellID1 = Integer.toString(cellID);
    	 
    	 Date date = new Date();
    	 ms= date.getTime();
    	 MyFunction();

        
     }
    
    public void MyFunction()
    { 
    	HttpClient httpclient = new DefaultHttpClient(); 
        //Your URL 
    	HttpPost httppost = new HttpPost("some URL...."+";"+lat+";"+lng+";"+serviceProvider+";"+cellID); 

    	try
    	{ 
    		List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2); 
                //Your DATA 
    		nameValuePairs.add(new BasicNameValuePair("licenseKey","12345")); 
    		nameValuePairs.add(new BasicNameValuePair("lat", lat1));
    		nameValuePairs.add(new BasicNameValuePair("lng", lat1));
    		nameValuePairs.add(new BasicNameValuePair("service", serviceProvider));
    		nameValuePairs.add(new BasicNameValuePair("cellID", cellID1));
    		
    		httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs)); 

    		HttpResponse response; 
    		response=httpclient.execute(httppost); 
    	}
    	catch (ClientProtocolException e)
    	{ 
    		// TODO Auto-generated catch block 
    		e.printStackTrace(); 
    	}
    	catch (IOException e)
    	{ 
    		// TODO Auto-generated catch block 
    		e.printStackTrace(); 
    	} 
    	System.exit(0);
    } 


}

But when I press 000 then application is not run in the background. But it hit the URL. But when I add line moveTaskToBack(true); in my PressingCameraKey class then application is run in the background but many times it will not hit the specified URL.

Then please tell me what should I have to do that application is run in the background and it hit the URL

Thanks in advance