Games : Is there something specific you need to do to finish the endless paths sword quest?

Im on level 13 of Od Nua in the pillars of eternity. im in the room with the secret door and a table. Everybody JUST keeps saying kill the enemies in the room and then click the table to open the door. The table is NOT click-able. is there something else i have to do first??

I have the 3 other pieces of the sword and only need the pommel from the room i cant get into. HELP!