request-scope attributes exist only while a request is being processed on the server side. In the JSP, the attributes are available only while the page is being rendered. Once the page gets rendered and the response goes out to the client, the attributes disappear (since your request has gone out of scope, it's attributes go out of scope as well).
You might want to keep your attribute in the session scope instead although I'm not sure I understand why you want to play around with a Form bean since the
Struts framework already manages them in the session scope anyway. Besides, the form is always passed to your Actions execute()/perform() method so there's hardly ever any reason to do what it looks like you're trying to do.