Skobbler Map: reverse geocodder returning NULL for some attibutes in SKSearchResult

Question

Under SKSearchResult object, the parameters street, house number, neighbourhood, zip code, state code, region, citySector, state, and poi always contains NULL in result. Any solutions? Thanks..

if(mapView!=null) {
        SKSearchResult result = SKReverseGeocoderManager.getInstance().reverseGeocodePosition(mapView.getMapCenter());
        if (result != null) {
            String address = "";
            Log.d("Test", " result " + result.getAddress());
            address+=result.getName()+"\n";

            //address+=result.getAddress();

            if(result.getAddress().getStreet()  != null)
                address+=" "+result.getAddress().getStreet();//here return null
            if(result.getAddress().getHouseNumber()  != null)
                address+=" "+result.getAddress().getHouseNumber();//here return null
            btnAddress.setText(address);
        }
    }