log in with invisible status ?

[Joe Wong]

hi
seems like with jabber-net, if i log into gtalk server with invisible
presence (instead of available), i will not able to get presence
message from user on my roster (but i can still chat with the users) ?

the presence error was (in PresenceManager->GotPresence)

Code = 400
Condition = "bad-request"
ErrorType = modify jabber.protocol.client.ErrorType
Message = "If set, the presence stanza type must be one of
'unavailable', 'subscribe', 'unsubscribe', 'subscribed',
'unsubscribed' or 'error'."

Do i have to log in as available to recieve roster presence update ?
if so, how does the regular GTalk able to log in as invisible while
getting all roster update ?

many thanks