Matrix Column user field value not adding

I have created a field in WOR1 as test. Table in production order rows

i have created one new tab and new matrix in it and a column test

i have given like this

oColumn = oColumns.Add("Col_test", SAPbouiCOM.BoFormItemTypes.it_EDIT)

            oColumn.TitleObject.Caption = "test1"

            oColumn.Width = 200

            oColumn = oColumns.Item("Col_test")

            oColumn.DataBind.SetBound(True, "WOR1", "U_test")

bt while addding data. data in not adding

any extra coding is needed for it?