اجرا نشدن setOnItemClickListener (حل نشده-خیلی مهم)

سلام. من یک image gallry ساختم که می خوام وقتی روی هر کدام از تصاویر کلیک میشه به من یک toast نمایش بده. ولی این قسمت کد کار نمیکنه. کل سورس پروژم را در زیر قرار میدم. اگر امکان داره بررسی کنید ممنون میشم.

MainAlbumGalleryDrees.class

 public class MainAlbumGalleryDrees extends Activity {
	private GridView gridView;
	private GridViewAdapter customGridAdapter;

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

		gridView = (GridView) findViewById(R.id.gridView);
		customGridAdapter = new GridViewAdapter(this, R.layout.row_grid, getData());
		gridView.setAdapter(customGridAdapter);

		gridView.setOnItemClickListener(new OnItemClickListener() {
			public void onItemClick(AdapterView<?> parent, View v,
					int position, long id) {
				Toast.makeText(MainAlbumGalleryDrees.this, position + "#Selected",
						Toast.LENGTH_LONG).show();
			}

		});

	}

	private ArrayList<ImageItem> getData() {
		final ArrayList<ImageItem> imageItems = new ArrayList<ImageItem>();
		// retrieve String drawable array
		TypedArray imgs = getResources().obtainTypedArray(R.array.image_ids);
		for (int i = 0; i < imgs.length(); i++) {
			Bitmap bitmap = BitmapFactory.decodeResource(this.getResources(),
					imgs.getResourceId(i, -1));
			imageItems.add(new ImageItem(bitmap, "Image#" + i));
		}

		return imageItems;

	}

}

ImageItem.class

 public class ImageItem {
	private Bitmap image;
	private String title;

	public ImageItem(Bitmap image, String title) {
		super();
		this.image = image;
		this.title = title;
	}

	public Bitmap getImage() {
		return image;
	}

	public void setImage(Bitmap image) {
		this.image = image;
	}

	public String getTitle() {
		return title;
	}

	public void setTitle(String title) {
		this.title = title;
	}
}

GridViewAdapter.class

 public class GridViewAdapter extends ArrayAdapter<ImageItem> {
	private Context context;
	private int layoutResourceId;
	private ArrayList<ImageItem> data = new ArrayList<ImageItem>();

	public GridViewAdapter(Context context, int layoutResourceId,
			ArrayList<ImageItem> data) {
		super(context, layoutResourceId, data);
		this.layoutResourceId = layoutResourceId;
		this.context = context;
		this.data = data;
	}

	@Override
	public View getView(int position, View convertView, ViewGroup parent) {
		View row = convertView;
		ViewHolder holder = null;

		if (row == null) {
			LayoutInflater inflater = ((Activity) context).getLayoutInflater();
			row = inflater.inflate(layoutResourceId, parent, false);
			holder = new ViewHolder();
			holder.imageTitle = (TextView) row.findViewById(R.id.text);
			holder.image = (ImageView) row.findViewById(R.id.image);
			row.setTag(holder);
		} else {
			holder = (ViewHolder) row.getTag();
		}

		ImageItem item = data.get(position);
		holder.imageTitle.setText(item.getTitle());
		holder.image.setImageBitmap(item.getImage());
		return row;
	}

	static class ViewHolder {
		TextView imageTitle;
		ImageView image;
	}
}

 ممنون میشم اگر راهنمایی کنید