help with og configuration

Hi All,

one question related to og and notifications. How can i at a sender or sender_account to the messages generated by og.

I have notification and messaging installed and i´m using messaging_simple module to display the messages to the users. in the message table i allways have System in the row from. I tryed allready to add a sender to the $message = array(
'sender' => $account->uid,
'subject' => _og_user_mail_text('og_new_admin_subject', $variables),
'body' => _og_user_mail_text('og_new_admin_body', $variables)
);

like shown in the readme for messaging but i never have a sender at all.

Any idea how this works?

Dirk