Microsoft JScript runtime error: FindControl requires that controls have unique IDs
<p>I'm programmatically adding a row to a System.Web.UI.WebControls.Table inside an UpdatePanel.  I then add cells to the row and controls to the cells.  </p>

<p>Once the controls have been added I get Microsoft JScript runtime error:</p>

<p>"Sys.WebForms.PageRequestManagerServerErrorException: Multiple controls with the same ID 'txtValue' were found.  FindControl requires that controls have unique IDs."</p>

<p>Because the controls are in seperate rows, should then not get their own client IDs, making them unique?</p>
