protected void btnAddProductType_Click(object sender, ImageClickEventArgs e)
        {
            Promotion   p = GetCurrentPromotion();
            ProductType q = (ProductType)GetCurrentQualification(p);

            if (q == null)
            {
                return;
            }
            q.AddProductType(this.lstProductTypes.SelectedValue);
            MyPage.MTApp.MarketingServices.Promotions.Update(p);
            LoadProductTypeEditor(q);
        }