Hi chinna raja,

just a guess:

1. Do you use a seam managed persistence context ? (see: http://docs.jboss.org/seam/3/persistence/3.0.0.Alpha1/reference/en-US/html_single/#persistence.seam-managed-persistence-contexts )

2. What's the scope of your bean (guestName) ? I guess ConversationScoped ?

3. If it is ConversationScoped: did you start a Conversation and is it active while you're using the autoComplete component ? You can check that if you put this somewhere in your xhtml page:

<span>#{conversation.transient ? 'transient' : 'long-running, id: '.concat(conversation.id)}</span>

If it says transient, try to call a method annotated with @Begin like this:

<f:metadata>
    <s:viewAction action="#{projectController.beginConversation()}"/>
</f:metadata>

And in the bean (just an empty method):

@Begin
public void beginConversation() {
}

Hope that helps :-)

komat