[news.eclipse.platform.swt] Toolbar problem

[Gabriela@xxxxxxxxxxx (Gabriela)]

Hey,   I have a visual editor and I want to contribute withinn the 
toolbar. So, I have a subclass of MultiPageEditorActionBarContributor 
public class MyActionBarContributor
extends MultiPageEditorActionBarContributor {

IToolBarManager tbm;

I've redefine setActivePage Method

public void setActivePage(IEditorPart part) {
if (activeEditorPart == part)
return;

                 (...)
tbm.add(new Separator());
 tbm.add(new Action());
                 (...)

                 tbm.update(false);
 bars.getMenuManager().updateAll(true);
}

public void contributeToToolBar(IToolBarManager manager) {
IActionBars bars = getActionBars();
tbm = bars.getToolBarManager();



but the only which is update is the menu, not the toolbar.. :(.. but the 
information is actually in tbm variable.

I've reading about the problem and I found that redefining the  
selectionChanged Method from the editor could help me in the refresh

public void selectionChanged(IWorkbenchPart part, ISelection selection)
{
        IEditorPart editorPart =
getSite().getWorkbenchWindow().getActivePage().getActiveEditor();
    if (editorPart instanceof MyMultiPageEditorPart)
        editorPart = 
((MyMultiPageEditorPart)editorPart).getMyActiveEditor();
    if (this.equals(editorPart))
        updateActions(getSelectionActions());
    }

but it does not work.. I will appreciate any idea
Thanks
Gab