Capture Signet help in Factions!

I have tried the capture signet quest in Cantha like 5 times and I have failed each time! Its the one where you have to sneak up on the two enimies and find out where the thingy is located without getting caught. So I wait for them to end talking and then they just walk away in differnet directions and I keep following them for like 10 minutes and nothing happens...Arg its making me insane! Any help would be nice! Thank you.

u dont need to follow them just kill tham and go to east! it shows a new point on map after they talk is over

Ok thanks a bunch!