#2 - Aug. 20, 2010, 5:17 a.m.
Orango may have guessed correctly. If you are not receiving credit for a quest accomplishment you very well may be in a raid while you are attempting this.
If you are not sure if you are in a raid group please give the following command a try. Make sure you type it exactly how I have it.
/script LeaveParty()
It should be noted that if you do abandon the quest, though the item will be destroyed you simply need to speak with the last NPC in the quest line to pick the quest up again. A new quest item will be given to you. :)