UI Dialog Problem, instance issues

UI Dialog Problem, instance issues

I have a html table, when the user click one of the cells it opens a dialog, and perform some actions using a form inside this dialog, but when I click again on another cell it seems that it creates a new dialog and a new form so now i have two dialogs with the same id and 2 forms and such..,
so my questojs is: if im calling the same dialog $(myDiv").dialog('open') on every cell click, why it creates a new one and the form doesn't work anymore?.

Here's the code:

//-------------------------------------------------------------------
    $('#tbodyArtReportadosListado tr:not(:last)').find('td').livequery('click',function(){
         var idTr = $(this).parents('tr').attr('id'); //Every row has it's own id
             nombreInsumo = $(this).parents('tr').find('td:eq(1)').text(); //I need the text from the second cell of the row
         
         $('#hdnIdArticuloReportado').val(idTr);    
         $('#txtNombreProducto').val(nombreInsumo);
         
          $('#divCrearArticulo').dialog('open');     
        return false;
    }); 
//-------------------------------------------------------------------