Finding control in a asp.net panel

[Daxpheree]

How can I find the controls from a panel using c#. Am using the below code to find the control. But it always return null.My partial code is here:\[code\]DropDownList ddl = new DropDownList();ddl.ID = "ID" + i;ddl.DataValueField = "fld_Head";ddl.DataTextField = "fld_Head";ddl.DataSource = DVS;ddl.DataBind();Panel1.Controls.Add(ddl);Panel1.Controls.Add(new LiteralControl("  "));\[/code\]Another Process Code :\[code\]if (DT.Rows.Count > 0){ string head = Convert.ToString(DT.Rows[i - 1]["fld_Head"]); if (head != "") { DropDownList Head = ((DropDownList)this.Panel1.FindControl("ID" + i)); Head.SelectedItem.Text = head; }}\[/code\]