Can not access embedded controls in Asp:Table

I have an asp:table control that I add multiple rows to with two columns.  I add a label control to the 1st cell and a textbox to the 2nd cell.  When the user clicks the update button I get the table control so I can iterate over the rows to update data in the database.  The problem is when I get the table control it has no rows.  What am I missing.

The following are the code segments I'm attempting to use.

1        Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
2            If Not Page.IsPostBack Then
3              ...