Pit of Saron quest bug

[sa6kobg]

I dont have the quest from FoS that lets me go in Pit of Saron, or at least I thought I took it. I have nothing at the start of the instance (FoS) like quests and I still cant get in. It says that I have to do Echoes of Tortured Souls quest in order to be able to go in the Pit of Saron instance. I'll be very thankful if someone understands that and helps me. My character is Ybieca (Blood Elf Death Knight) on 3.3.5a x5.

[I_don't_love_you]

Look for this NPC: https://wowhead.com/npc=37780/%D1%82...B5%D0%BB%D1%8C. She is usually near the Horde bank in Dalaran.