I have a IOException error??

public class MainListActivity extends ListActivity {
    private String[] mBlogPostTitiles;
    public static final int NUMBER_OF_POST = 20;
    public static final String TAG = MainListActivity.class.getSimpleName();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main_list);

        GetBlogPostTask getBlogPostTask = new GetBlogPostTask();
        getBlogPostTask.execute();
        //Toast.makeText(this, getString(R.string.no_item), Toast.LENGTH_LONG).show();
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {

        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main_list, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    private class GetBlogPostTask extends AsyncTask<Object, Void, String> {
        int responseCode = -1;

        @Override
        protected String doInBackground(Object... arg0) {
            try {
            URL blogFeedUrl = new URL("http://blog.teamtreehouse.com/api/get_recent_summary/?count="+ NUMBER_OF_POST);
            HttpURLConnection connection = (HttpURLConnection) 

            blogFeedUrl.openConnection();
            connection.connect();

            responseCode = connection.getResponseCode();
            Log.i(TAG, "respondCode is: " + responseCode);

        } catch (MalformedURLException e) {
            Log.e(TAG, "URL Errot caught", e);
        } catch (IOException e) {
            Log.e(TAG, "IO Errot caught", e);
        } catch (Exception e) {
            Log.e(TAG, "General Errot caught", e);
        }
            return "Code:" + responseCode;
        }
    }

}