dynamic tables with Ajax

I have a dynamic table in c# 2.0. The page has a Buton that
add new row
in the database.
I try add this row in my Html Table witch Ajax method, but
raise an
ComPlusExceptioncode. An example of this code is:

[Ajax.AjaxMethod(HttpSessionStateRequirement.Read)]
	public void cargarUtillajesAjax() {
		string insert = "insert into
OFERTAS_UTILLAJES(id_oferta,tipo) values
(" + Session["id_oferta"] +
",1)";
		FachadeClass.ejectSqlComand(insert);
		TableRow rr=new TableRow();
		TableCell cc=new TableCell();
		cc.ID="myCell";
		cc.Text="My text";
		rr.Cells.Add(cc);
		rr.ID="myrow";
		tablaProt.Rows.Add(rr); //tableProt is the table when I
want add the
new row.

The exception is raise on line
"tableProt.Rows.Add(rr)". I want add
rows without reload the page. Exits other form?? 

Thanks, Iván.


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