Getting CheckBox in ControlCollection

 protected void subCheckAll(object sender, EventArgs e)
    {
       checkAllHTML(this, ((CheckBox)sender).Checked);
    } 
    // This is the Event of the CheckBox

  private void checkAllHTML(Control parent, bool blnChecked)
    {
        string sParentTest = parent.Controls.GetType().ToString();

        string sParentTest2 = parent.GetType().ToString();

        //string sParentTest3 = Parent.Controls.GetType().ToString();

            foreach (Control child in parent.Controls)
            {
                if (child is CheckBox)
                {
                    CheckBox chk = (CheckBox)child;
                    chk.Checked = blnChecked;
                    //((CheckBox)child).Checked = blnChecked;
                }
                if ((child.Controls.Count > 0))
                {
                    checkAllHTML(child, blnChecked);
                }
            }
     } // Error - Control child is always LiteralControl 
       // I tried casting it as a checkbox but it don't work as well...

 private void CreateCheck()
    {
        //Put user code to initialize the page here
        CheckBox chkBox = new CheckBox();
        int i = 0;
        DataSet ds = new DataSet();
        int lintHeadID = 0;
        string lstrGroup = string.Empty;
        bool lblFisrt = false;
        ds = CreateDataSource();
        lstrGroup = "";
        lblFisrt = false;
        lintHeadID = 0;
        for (i = 0; i <= ds.Tables[0].Rows.Count - 1; i++)
        {
            if (lstrGroup != ds.Tables[0].Rows[i][3].ToString()) // Rows[i][3] <-- The [3] The 3rd Column in the Table
            {
                lintHeadID = lintHeadID + 1;
                lstrGroup = (string)ds.Tables[0].Rows[i][3];

                string sHeaderID = lintHeadID + "00";
                chkBox.ID = String.Format(sHeaderID) + "chkHeader" + i;
                //chkBox.ID = Strings.Format(lintHeadID, "00") + "chkHeader" + i;
                chkBox.Text = lstrGroup;

                chkBox.Font.Bold = true;
                chkBox.Font.Name = "Verdana";
                chkBox.Font.Size = FontUnit.XSmall;
                chkBox.Width = Unit.Percentage(100);
                chkBox.BackColor = Color.SkyBlue;
                chkBox.Font.Underline = true;
   
                TableRow tr1 = new TableRow();

                TableCell td3 = new TableCell();
                TableCell td1 = new TableCell();
                td3.Width = Unit.Percentage(5);
                tr1.Cells.Add(td3);
                td1.Controls.Add(chkBox);
                tr1.Cells.Add(td1);
                lblFisrt = !lblFisrt;
                if (lblFisrt)
                {
                    tblPermission.Rows.Add(tr1);
                }
                else
                {
                    tblPermission2.Rows.Add(tr1);
                }
                chkBox.AutoPostBack = true;
                chkBox.CheckedChanged += Master_CheckedChanged;
            }
            chkBox = new CheckBox();
            string sHeadID = lintHeadID + "00";
            chkBox.ID = String.Format(sHeadID) + "chkDetail" + i;
            chkBox.Text = (string)ds.Tables[0].Rows[i][1];
            chkBox.ToolTip = (string)ds.Tables[0].Rows[i][0];
            //store permission id in tooptip


            TableRow tr = new TableRow();
            TableCell td = new TableCell();
            TableCell td2 = new TableCell();

            td2.Width = Unit.Percentage(5);
            tr.Cells.Add(td2);
            td.Controls.Add(chkBox);
            tr.Cells.Add(td);
            chkBox.CheckedChanged += Detail_CheckedChanged;
            if (lblFisrt)
            {
                tblPermission.Rows.Add(tr);
            }
            else
            {
                tblPermission2.Rows.Add(tr);
            }
        }   
    } // I create the checkboxes based on the results returned from my Dataset