Beat all of the Red Eclipse thugs outside (and inside) the Ebon Hawk. Then face Visas. Once that is done, leave the Ebon Hawk and walk around Nar Shadaa some more (doesn't matter who is in your party). After a small amount of time the cutscene with Atton telling you of the message should automatically play. After that, the final leg of the quest will be unlocked and you can continue.