How to call setOnInstalledPackaged always

I have this code but the method packageInstalled It does not work when I update some apks, it is as if it were never called.

        ApplicationManager am;
        am = new ApplicationManager(contexto);
        am.setOnInstalledPackaged(new OnInstalledPackaged() {

            public void packageInstalled(String packagName, int returnCode) 
            {
                  if (returnCode == ApplicationManager.INSTALL_SUCCEEDED)
                {
                    // CODE
                }
                 else
                 {
                    // CODE
                 }
            }

        });