So i kill the first 6 groups of spawns of abyss or whatever they are, go to the 2 elites and kill them, try moving to the boss next to portal and says 'To enter the hall you need first to obliterate the Spawn of Abysss at the slope.' i already killed them, so i cant complete the quest for the 250 defender of adan rep, anybody got any ideas as to why this is happening, will upload screenshot of this to my gallery, thanks