I have run this code:
sudo -u ejabberd /usr/sbin/ejabberdctl send_direct_invitation mt75_1 conference.msg.hajmobility.my none none msg_din@msg.hajmobility.my:msg_apool@msg.hajmobility.my
It works for the first time.
But when i want to add the same user into another MUC room using the same code its not working.