problem on integrating spring with vaadin

When i use Spring dell-rode addon i am facing a problem with singleton pattern i.e., when i login to the application in one browser it is going to home page correctly, again when i login in another browser it is directly going to home page.
plz help me how to resolve this problem.

Thanks@Regards
Ravi teja

User-specific beans need to be in either prototype- or session-scope. Default-scope is application, which basically just creates a singleton.