Also, If the player does does not have the set equipped and they click on the stone, they are supposed to receive a shock from the stone: Abyssal Punishment http://old.wowhead.com/spell=24803
The quest appears to be functioning properly on Warsong, so it might be easier to fix it by looking at that one.
The quest Abyssal Contacts http://old.wowhead.com/quest=8361/abyssal-contacts, is not functioning. The player has to equip all three pieces to the Twilight Trappings set http://old.wowhead.com/itemset=492 which will apply http://old.wowhead.com/spell=24746#see-also-other to you allowing you to summon a random elemental from a Lesser Windstone http://old.wowhead.com/object=180456/lesser-wind-stone.
The elementals that are summoned from the Lesser Windstones are: http://old.wowhead.com/npc=15209 http://old.wowhead.com/npc=15211 http://old.wowhead.com/npc=15212 http://old.wowhead.com/npc=15307
Also, If the player does does not have the set equipped and they click on the stone, they are supposed to receive a shock from the stone: Abyssal Punishment http://old.wowhead.com/spell=24803
The quest appears to be functioning properly on Warsong, so it might be easier to fix it by looking at that one.
Screenshot shows no dialogue options when clicked with set equipped. http://img.photobucket.com/albums/v84/sparda1/Videogames/WOW/WoWScrnShot_061012_034745.jpg