addContainerProperty and Select.class

I have a problem with addContainerProperty, getContainerProperty and Select class.

Starting from http://vaadin.com/tutorial, SimpleAddressBook.java, i just added those lines in createDummyData method

private static IndexedContainer createDummyData() {
              //... unaltered variables
              for (String p : fields) {
			if(p.equals("Company")){
				ic.addContainerProperty(p, Select.class, null); // added by me
			}
			ic.addContainerProperty(p, String.class, "");
		}

		for (int i = 0; i < 1000; i++) {
			Object id = ic.addItem();
			ic.getContainerProperty(id, "First Name").setValue(fnames[(int) (fnames.length * Math.random())]);
			ic.getContainerProperty(id, "Last Name").setValue(lnames[(int) (lnames.length * Math.random())]);
			Select s =  new Select(); // added by me
			s.addItem("one");
			s.addItem("two");
			ic.getContainerProperty(id, "Company").setValue(s);
		}
       return ic;

When accesing any rows, editor in right part of window doesn't render Select values, while left Table control does.

I also added those lines to initLayout method:

private void initLayout() {
         // unaltered lines
contactEditor.setImmediate(true);
		contactEditor.setFormFieldFactory(new FormFieldFactory() { // added by me
			
			@Override
			public Field createField(Item item, Object propertyId, Component uiContext) {
				String p= (String) propertyId;
				if(p.equals("Company")){
					return new Select(p);
				}else{
					return new TextField(p);
				}
			}
		});
		bottomLeftCorner.setWidth("100%");
       // unaltered lines
     }

Screen capture:

Thanks in advance,