[Haskell-cafe] Help with Menu item handlers in gtk2hs with glade

I designed a basic GUI with Menu bar and menu items in glade. I use the glade bindings in haskell to get the menu item using xmlGetWidget and castToMenuItem function. I set a *onActivateItem* handler for this menuitem. However this is not working. I saw the glade file and it has a signal function in the xml. I tried to use the same function name, but it doesn't work either. Any suggestions on what I might be doing wrong here and how to get menu item handlers working.