SectionStackSection deleteItem ?

[jose.hello]

I work with smartgwt power version 3.0

I do this code

SectionStackSection userSection = new SectionStackSection(userSectionTitle);
userSection.setItems(userDetailForm);
userSection.setCanCollapse(true);
userSection.setExpanded(true);
userSection.setControls(newRequestUserButton, newButton, removeButton, saveButton);

When I click on newRequestUserButton I want draw a new HLayout in userSection

But when I do this :
userSection.setItems(myHlayout);

The userSection doesn't change.

Should I have to delete the userDetailForm item ? With which method ?

[jose.hello]

Is it not possible to change the SectionStackSection content ?

Should I have to do this : http://www.java2s.com/Code/Java/GWT/...elSmartGWT.htm

I have to redraw the SectionStackSection ?

Or How to proced ?