Vuforia TextRecognition Adding words at runtime

Hi;
Im trying to add words at runtime too. But cant make it work. Im using this code:

On the class TextEventHandler of the TextReco example

TextTracker textTracker = (TextTracker)TrackerManager.Instance.GetTracker();
if(!textTracker.WordList.ContainsWord(“Sirea”)){
textTracker.WordList.AddWord(“Sirea”);
}

I have following the instructions of here : https://developer.vuforia.com/library/articles/Solution/How-To-Implement-Text-Recognition-in-Unity

I have read:

Quote:
Changes to the word list are not allowed while the text tracker is running.

But if I add

TextTracker textTracker = (TextTracker)TrackerManager.Instance.GetTracker();
textTracker.Stop ();
if(!textTracker.WordList.ContainsWord(“Sirea”)){
textTracker.WordList.AddWord(“Sirea”);
}
textTracker.Start();

I cant recognize anything.

Im using Unity 5.3.4 And Vuforia 5.9

I really need a help on this.

Thank you in advance

I am also working on it and the link you have specified : https://developer.vuforia.com/library/articles/Solution/How-To-Implement-Text-Recognition-in-Unity I am also referring the same link, but I can only see the word is found.Script is written into DefaultTrackableEventHandler class which is attached with word prefabs but when I am implementing OnWordDetected and OnWordLost methods then that method are no more callable. could you please help to solve this problem please.