List View in Horizontal View Pager not updating
===

I have a horizontal view pager to page through 3 ListViews. The Three list Views are populated from three different tables of a database. The problem is that the while I swipe through the page, the listview is not loading, instead it shows a white screen.

    @Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
                setContentView(R.layout.viewp);
		MyPagerAdapter adapter = new MyPagerAdapter();
		ViewPager myPager = (ViewPager) findViewById(R.id.threepageviewer);
		myPager.setAdapter(adapter);
		myPager.setCurrentItem(1);
    }

    private class MyPagerAdapter extends PagerAdapter {

		public int getCount() {
			return 3;
		}

		public Object instantiateItem(View collection, int position) {

			LayoutInflater inflater = (LayoutInflater) collection.getContext()
					.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

			int resId = 0;
			switch (position) {
			case 0:
				resId = R.layout.left;
				ListView list = new ListView(Listing.this);
				helper = new DbHelper(Listing.this);
				dataset_cursor1 = helper.getAll1();
				startManagingCursor(dataset_cursor1);
				adapter1 = new NoteAdapter(dataset_cursor1);
				list.setAdapter(adapter1);
				adapter1.notifyDataSetChanged();

				break;
			case 1:
				resId = R.layout.middle;
				ListView list1 = new ListView(Listing.this);
				helper = new DbHelper(Listing.this);
				dataset_cursor2 = helper.getAll();
				startManagingCursor(dataset_cursor2);
				adapter2 = new NoteAdapter(dataset_cursor2);
				list1.setAdapter(adapter2);
				adapter2.notifyDataSetChanged();
				break;
			case 2:
				resId = R.layout.right;
				ListView list2 = new ListView(Listing.this);
				helper = new DbHelper(Listing.this);
				dataset_cursor3 = helper.getAll2();
				startManagingCursor(dataset_cursor3);
				adapter3 = new NoteAdapter(dataset_cursor3);
				list2.setAdapter(adapter3);
				adapter3.notifyDataSetChanged();

				break;
			}

			View view = inflater.inflate(resId, null);

			((ViewPager) collection).addView(view, 0);

			return view;
		}

		@Override
		public void destroyItem(View arg0, int arg1, Object arg2) {
			((ViewPager) arg0).removeView((View) arg2);

		}

		@Override
		public void finishUpdate(View arg0) {

		}

		@Override
		public boolean isViewFromObject(View arg0, Object arg1) {
			return arg0 == ((View) arg1);

		}

		@Override
		public void restoreState(Parcelable arg0, ClassLoader arg1) {

		}

		@Override
		public Parcelable saveState() {
			return null;
		}

		@Override
		public void startUpdate(View arg0) {

		}

		public int getItemPosition(Object object) {
			return POSITION_NONE;
		}
	}

What could be the problem here.