Need help in Dragon's Throat

Howdy- I'm at level 19 and finished the Vizunah Square mission. After that I was put in a Challenge Mission in Dragon's Throat which I've done numerous times but can't complete. I've lasted the full 15 minutes and have gotten a score of 75, but at the end my party is suddenly killed when the words 'You have failed the mission' appear. What do I have to do to complete this mission?
Even better, is there a way I can skip this unnecessary mission and get on with the main mission?
Thanks for your help-
Phil

To progess further in the campaign just talk to Messenger Gosuh and take the quest 'finding the Oracle'
You die at the end of the time period, You can extend that time by killing bosses, the idea is to kill as many Afflicted as you can in the time limit. Hope that helps

http://wiki.guildwars.com/wiki/Dragon%27s_Throat

Yes. Dragon's Throat is purely optional (and after 15 minutes...you ALWAYS lose. That's just the time limit).

There should be a primary quest you can grab to continue on with the story.

EDIT: Messenger Gosuh has your next quest in line. He's in Dragon's Throat somewhere

Thanks for the replies, but I found Messenger Gosuh in the 'staging area' of Dragon's Throat where I create my party, and all he does is talk about the plague and his lean-to, nothing about a quest.
I looked around for him inside the Challenge Mission area where I battle the Afflicted but can't find him.

possible you finished the first primary and talked to togo right outside of shadows passage then found nika and didnt pick up her quest closer to the stars that takes you to vizunah square. she should be in buhdek byway i think about right smack in the middle of it. the first quest is finding the oracle gotten from the guy right inside the outpost of dragons throat

Thanks, Rick1027, Nika was right where you said she'd be and I'm back on the primary quest.