Timeline is not loaded
===

I have created an application to integrate with twitter i login but my timeline is not loaded and gives me error at that line
**ResponseList<Status> status=twitter.getHomeTimeline();**
here is the log cat

    07-12 04:48:23.478: E/AndroidRuntime(497): java.lang.RuntimeException: Unable to resume activity {a.a.a/a.a.a.StatusListActivity}: java.lang.NullPointerException

here it is the function

  

      private void loadHomeTimeline()
        	{
        	try {
        		
        		twitter=new TwitterFactory().getInstance();
        		authhelper.configureOAuth(twitter);
        		
        		ResponseList<Status> status=twitter.getHomeTimeline();
        		setListAdapter(new ArrayAdapter<Status>(getApplicationContext(), android.R.layout.simple_list_item_1, 
        				status));
        		
        		
        		
        	} catch (TwitterException e) {
        		// TODO Auto-generated catch block
        		e.printStackTrace();
        		//Toast.makeText(getApplicationContext(), "jj", Toast.LENGTH_SHORT).show();
        	}
        	
        }