Send HTML no work

[ZephiroRB]

mimi = MadMimi.new('emailaddress', 'api_key', { :raise_exceptions => true })

options = {
'promotion_name' => 'Test Promotion',
'recipients' => 'Nicholas Young nicholas@madmimi.com',
'from' => 'MadMimi Ruby rubygem@madmimi.com',
'subject' => 'Test Subject'
}
raw_html = "<title>My great promotion!</title>Body stuff[[tracking_beacon]]"

mimi.send_html(options, raw_html)

not send and not save. error Net::HTTPServerException (403 "Forbidden")

Only save when >

mimi.save_promotion('promotion_name', 'raw_html', 'plain_text') # saves a promotion (creates the promotion if it does not exist)

How to send promotion saved?