Android : how perform the click of Actionbar Item In sherlock Fragment in android

i want to perform click of actionbar item in sherlock fragment my item is showing on fragment class on action bar ....but when i click on item .. doing nothing mean not showing Toast message ....

please can u tell me where i m soing wrong ?

here is my Code of sherlock Fragment

@Override
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
        // TODO Auto-generated method stub
         inflater.inflate(R.menu.profile_menu_items, menu);
         super.onCreateOptionsMenu(menu, inflater);

    }
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // TODO Auto-generated method stub
         switch (item.getItemId()) {
         case R.id.Online:
            // do s.th.
             Toast.makeText(getActivity(), "online", Toast.LENGTH_SHORT).show();
            return true;
         default:
        return super.onOptionsItemSelected(item);
    }



@Override
    public void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub

        super.onCreate(savedInstanceState);
         setHasOptionsMenu(true);

    }}

here Is MEnu File

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android" >

 <item android:id="@+id/Online"
       android:showAsAction="always"
        android:title="Online"/>
</menu>

thanku In Advance