load an Application from other Application ( on different context )

Hello, I need help with a type of redirection in Vaadin 6. I need to instantiate from the main class that extends Application to another domain . The context of the first application is / APP_WEB 1 and need to reload the web in / APP_WEB2 . I 've tried to do with response.sendirect ( " https : // …") does not work. Any ideas ? Thanks and regards .