Setting Text with setFilterEditorCriteria?

[gsl1]

I am trying to set the prompt text "Find field:" in a filter editor in a listGrid using the following code, but I don't see any text show up in the filter editor that is displayed. I have not yet connected the grid to any data, but I assumed that that was not necessary to see the filter text:

        final ListGrid listGrid = new ListGrid();
        listGrid.setWidth(200);
        listGrid.setHeight(150);
        listGrid.setAlternateRecordStyles(true);
        listGrid.setShowFilterEditor(true);
        listGrid.setFilterOnKeypress(true);
        listGrid.setAlign(Alignment.CENTER);
        listGrid.setShowAllRecords(true);
        listGrid.setCanEdit(false);
        ListGridField listGridField = new ListGridField("myField", "Select field:", 180);
        listGridField.setAlign(Alignment.CENTER);
        listGridField.setType(ListGridFieldType.TEXT);
        listGrid.setFields(new ListGridField[] {listGridField});
//        listGrid.setData(someData.getRecords());
        listGrid.setFilterEditorCriteria(new Criteria("myField","Find field:"));
		...

Any idea what I'm doing wrong?