master detail datalist

[sagdude]

I have a master detail datatable and add a relation
DataRelation relation = new DataRelation("P artNoRelation", Dt_Cart.Columns["PartNo"], Tbl_NearestCent ers.Columns["PartNo"],false);
Ds_CartItem.Rel ations.Add(rela tion);
when I try to add my detail to a radiobutton list in datalist(the master information are show in data list)I use this code
but it shows all the data in detail table not just the related one

private void DataList1_ItemD ataBound(object sender, System.Web.UI.W ebControls.Data ListItemEventAr gs e)
{
DataTable Tbl_Info= ( DataTable ) Session [ "myTable" ];
if (e.Item.ItemTyp e == ListItemType.It em || e.Item.ItemType == ListItemType.Al ternatingItem)
{

((RadioButtonLi st) e.Item.FindCont rol("dProducts" )).DataSource = ((DataRowView) e.Item.DataItem ).CreateChildVi ew("PartNoRelat ion").Table.Def aultView;
((RadioButtonLi st) e.Item.FindCont rol("dProducts" )).DataTextFiel d="WareHouseZip Code";
((RadioButtonLi st) e.Item.FindCont rol("dProducts" )).DataValueFie ld="WareHouseZi pCode";
((RadioButtonLi st) e.Item.FindCont rol("dProducts" )).DataBind();
((RadioButtonLi st) e.Item.FindCont rol("dProducts" )).AutoPostBack = true; }

}
I tried to check if my relation works
foreach(DataRow drPublisher in Tbl_Info.Rows) { Response.Write( drPublisher["PartNo"]);
Response.Write( "============== =======");

foreach(DataRow drTitle in drPublisher.Get ChildRows("Part NoRelation"))
{
Response.Write( drTitle["WareHouseZipCo de"]);
}
Response.Write( "<br>");
it works good and shows just the related information for each master detail
why doesnt' it work in my data list? }

--
Sagdude