unable to pass null to execute(); method of AsyncTask in android 4.0

i am trying to pass null value to execute(); method of AsyncTask in android 4.0 it show error "The method execute(Integer[]) is ambiguous for the type" but same code is work fine with android 2.2 Code is : ``` public class AllianceAnalysisDemoActivity extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); new AsynPageLoader().execute(null); } public class AsynPageLoader extends AsyncTask<Integer, Integer, Bitmap> { @Override protected void onPreExecute() { // progressBar.setVisibility(VISIBLE); } @Override protected Bitmap doInBackground(Integer... params) { return null; } @Override protected void onPostExecute(Bitmap result) { if (result != null && result.getHeight() > 0 && result.getWidth() > 0) { }else { } } } ``` } please help me how to pass null value .execute(null); method in android 4.0