Height Dialog problem

Height Dialog problem

Hi, I'm using Internet Explorer 7 with jquery.ui version 1.8.4.
I have a modal form dialog that I want to set with an specific height. I set the height option but nothing happend, the height is still 'auto' and in fact the dialog is heightless!
 
With FireFox is not a problem because I see the dialog well but the height is set to 'auto' as well.
 
In my HTML page there are a lot of form modal dialogs. Maybe the issue it's related with that.
 
With version 1.8 of jquery.ui everything went well so far but I've needed update it because of the new autocomplete functionality
Is anyone who can help me with this issue?
 
 
This is my code:

  1. $(

    "#dialogo_itemMemoPago_pagar").dialog({

    title:

    "Pagos a realizar para el C41 ",

    /*bgiframe: true,*/

    autoOpen:

    false,

    height: 352,

    width: 940,

    closeText:

    "Volver",

    modal:

    true,

    buttons: {

    "Cancelar": function() {

          /* do...*/
  2.       },
    "Guardar": function() {
  3.       }

    },

    close: function() {

    }});

Before I open the Dialog, I invoke this line:
 

  1. $(

    "#"+dialogObject.getIdDialogo()).dialog('option','title','Pagos a realizar para el C41 número '+c41Numero + ' año '+c41Anio);