Tracking ability not working - ranger class


I have a problem wirh my character in crom server. When I start to play the traking ability works perfectly showing a list of enemies and players nearby. My player is lvl 26 now and I want to try use it to track players in the borderline zones but when I press the tracking action charge a bar but nothing else happen. First I guess that was some kind of restriction in the pvp zones but I try in every zone that I visit recently and the list never show up again. Maybe I could press some key that disable it or something like that, but I really miss the ability now.

Thanks for advance for your help.