TabEnabled property not working

There are some text fields dynamically added to a MovieClip. The text field's property such as text.type, backgroundColor, etc have been set for each text field dynamically created when clicked on the 'add emails' link.

But I am having problem with the tabEnabled property of the text field. Inspite of setting the tabEnabled property to true it doesn't work.

On pressing the tab key it highlights a component of the movieclip(to which text fields are dynamically added)'s parent.

What might be the reason behind it?
Any help is greatly appreciated.

Try using tabIndex to set the tab position of each field.
For any help do post in this thread.