Parent page is not refreshing when closing the child winow

In Parent window : a gridview is there

column1  column2  column3
 
 a         b       linkbutton1

 c         d       linkbutton2



when clicked on linkbutton a child window popus up. i add something. And then close the child window[no button is made in child window to close..just normal close].

Again i click on linkbutton to check whether what i have added is there or not. but i dont find.

But if i log out completely from the application...again navigate to the parent page...and click on link button i find the thing that i added in child window is there...


--So is it like parent window is not refreshing when child window is closed. How to tackle this ? kindly help .

Parent page code :

protected void gridShuttleAdmin_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            //onmouse over and mouse out on the grid color changes
            e.Row.Attributes.Add("onmouseover", "this.previous_color=this.style.backgroundColor;this.style.backgroundColor='PaleGreen'");
            e.Row.Attributes.Add("onmouseout", "this.style.backgroundColor=this.previous_color;");

            Label lbltrip = (Label)e.Row.FindControl("lbltrip");
            if (lbltrip != null)
            {
                Label lblshuttledetailname = (Label)e.Row.FindControl("lblshuttledetailname");
                Label lblshuttlefacilityid = (Label)e.Row.FindControl("lblshuttlefacilityid");
                Label lblfacilityid = (Label)e.Row.FindControl("lblfacilityid");
                LinkButton lbtn = (LinkButton)e.Row.FindControl("lnkviewID");
                lbtn.Attributes.Add("onClick", "var sFeatures='dialogHeight: 700px;dialogWidth: 1000px;'; window.showModalDialog('Shuttle_StopDetails.aspx?shuttlefacilityid=" + lblshuttlefacilityid.Text + "&facility=" + lblfacilityid.Text + "&Trip=" + lbltrip.Text + "','',sFeatures);window.document.forms[0].submit();");

            }
        }
    }


--------------------------------child page------------------------------------------------
 protected void gridShuttleDetails_RowCommand(object sender, GridViewCommandEventArgs e)
    {
        if (e.CommandName == "AddNew")
        {
            int identityCreated;
            TMS.Business.ShuttleStopDetails ObjShuttleStopdetails = new TMS.Business.ShuttleStopDetails();
            TMS.API.ShuttleMaster.ShuttleMaster_IN objShuttleRouteManager = (TMS.API.ShuttleMaster.ShuttleMaster_IN)FillObjectFromScreen();
            int index = gridShuttleDetails.Rows.Count - 1;
            GridViewRow row = gridShuttleDetails.Rows[index];
            var Departurtime = ((Label)row.FindControl("lblDeparture")).Text;
            var lblFacilityNamecheck = ((Label)row.FindControl("lblFacilityName")).Text;
            if (lblFacilityNamecheck != "" && (objShuttleRouteManager.Shuttle_Facility_Name == lblFacilityNamecheck))
            {

                //ScriptManager.RegisterStartupScript(Page, typeof(Page), "", "alert('" + System.Configuration.ConfigurationSettings.AppSettings["Facility_Check"].ToString() + "');", true);

                ScriptManager.RegisterStartupScript(Page, typeof(Page), "", "alert('Please Enter A Different Facility')", true);

            }

            else
            {
                identityCreated = ObjShuttleStopdetails.Create(objShuttleRouteManager);

                if (identityCreated > 0)
                {
                    ScriptManager.RegisterStartupScript(Page, typeof(Page), "", "alert('" + System.Configuration.ConfigurationSettings.AppSettings["Save_Record"].ToString() + "');", true);
                    BindShuttleDetails();
                    UpdatePanel1.Update();

                }
                
            }
        }
    }