这段代码为什么在ＩＥ７下就能显示数据．在ＩＥ６中就不能显示数据

CS代码是
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            string region = Request.QueryString["region"];
            ViewState["region"] = region;
            int totalOrders = CatalogDataBase.GetOrder("P_GetOrderNumber3",region);
            AspNetPager1.RecordCount = totalOrders;
            bindData(region);
        }
    }    void bindData(string region)
    {
        DataList1.DataSource = DataBase.ExecuteReader(CommandType.StoredProcedure, "P_GetPagedOrdersQiye",
           new SqlParameter("@startIndex", AspNetPager1.StartRecordIndex),
           new SqlParameter("@endIndex", AspNetPager1.EndRecordIndex),
           new SqlParameter("@region", region)
           
           );
        DataList1.DataBind();    }
    protected void AspNetPager1_PageChanged(object src, EventArgs e)
    {
        string region = ViewState["region"].ToString();
        bindData(region);
    }
为什么在IE6中会没有数据?