EVENT is not the scope you want.
EVENT is just that it lasts for an event. Not across redirects or even across multiple events.
PAGE and CONVERSATION scopes are longer lasting and may be what you are looking for. Read the Seam doco about these scopes and apply what you learn to help you get your desired functionality.
Remembering of course that the conversation scope is very similar to page (across redirects) unless you promote it to long running via any of the different mechanisms available to do so.