Forum OpenACS Q&A: notifications for forums not working... unable to send email

Hello, i have a problem with notifications sending messages. I did an update of cvs today, and reinstalled, nevertheless i get this problem when notifications tries to send a message (notifications is sending it on behalf of the forums package), any ideas? Here is my server-error.log entry for this problem:

[31/Oct/2002:18:09:07][1651.120844][-sched:22-] Error: Transaction aborted: invalid command name "notification::email::send"
invalid command name "notification::email::send"
    while executing
"notification::email::send $to_user_id $reply_object_id $notification_type_id $subject $content"
    (procedure "AcsSc.NotificationDeliveryMethod.Send.notification_email" line 1)
    invoked from within
"AcsSc.NotificationDeliveryMethod.Send.notification_email 8576 8572 6928 {How do i log into 4youth.net?} {
Forum: 4Youth.net Q&A Forums
Thread: 8572
Au..."
    ("uplevel" body line 1)
    invoked from within
"uplevel $func_and_args"
    (procedure "apply" line 3)
    invoked from within
"apply $proc_name $arguments"
    (procedure "acs_sc_call" line 6)
    invoked from within
"acs_sc_call NotificationDeliveryMethod Send $args $impl_key"
    (procedure "notification::delivery::send" line 16)
    invoked from within
"notification::delivery::send -to_user_id [ns_set get $notif user_id]  -notification_type_id [ns_set get $notif type_id]  -subject [ns_set get $notif n..."
    ("uplevel" body line 3)
    invoked from within
"uplevel 1 $transaction_code "
    (procedure "db_transaction" line 1)
    invoked from within
"db_transaction {
                    # Send it
                    notification::delivery::send -to_user_id [ns_set get $notif user_id]  -notification..."
    (procedure "notification::sweep::sweep_notifications" line 80)
    invoked from within
"notification::sweep::sweep_notifications -interval_id 6366 -batched_p 0"
    ("eval" body line 1)
    invoked from within
"eval [concat [list $proc] $args]"
    (procedure "ad_run_scheduled_proc" line 43)
    invoked from within
"ad_run_scheduled_proc {t f 60 notification::sweep::sweep_notifications {-interval_id 6366 -batched_p 0} 1036115644 0 t}"
Notice: Running scheduled proc notification::reply::sweep::process_all_replies...
Notice: NOTIF- process_all_replies starting