Can't End Fiery Dust Act 3 Quest

The quest said, find a way to destroy the Undying blockage in the Warehouse Sewers, i did it before with my Marauder and i didn't have any problem :(

When i click in the quest i don't got any way in yellow like the others

Yellow way: http://i.imgur.com/uqErL3s.jpg

No yellow way: http://i.imgur.com/tn5kBaR.jpg

I'm thinking about i don't have some item or something to destroy it...but i did all the quest, it's bugged or something...

Please help!

Regards.

I'm having the same problem. I can't end it as well!



Edit: I found out what the problem was. You have to go to battlefront then from there go into the temple. Keep going through the temple until you talk to an npc. She will give you the quests you need.

Sweeeet .............. I was stuck on this too. Gracias

Yes, you must get some explosive called tramagurgic sulphite or something similar from the lady in the bottom of Solaris Temple.
This explosive will blast away the blockage.
She also gives you access to the Eternal Laboratory so you can do maps (in merciless).