Cat Feline armor set quest bug?

[Ravenheart1978]

Cat Feline armor set quest bug?

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http://oi59.tinypic.com/2ymyd1x.jpg
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Hi, i have this problem:

In this quest where you have to find the armor set cat upgrade, I bought maps from a merchant and it appeared the marker on the map to find the armor only that the chest is not clickable.
I went back to an old rescue several days ago and actually I had already opened that chest and this item not present in the chest. I am afraid that by opening it before taking the quest is bugged me and now the recipe for strengthening the cat armor is lost now. If so it is really absurd, I must be careful what I open and I find because maybe a future one quest bugged for this. I fear that I played one of the best armor in the game for this thing.
I state that is a research level 34 and I'm still far away. But I do not know if that casket is closed because I had already previously opened or is released only once made the other two quest for this gear

 

[Ravenheart1978]

I solved the problem

 

[Loata1]

Could you tell me how you solved the problem because I have the problem with all of the sets.
I only got the enhanced parts from the chests but later on I only got the weapons and chest pieces out of the chests because I already opened all of the
chests sometime before taking those quests.
Please help would suck to lose those awesome sets because of a stupid bug.