when should i register pls help

Your ending date of articles without excess leaves :

25th february 2011 to 25 february 2014 = 3 years..

Your final attempt will be :

25th february 2011 to 25 february 2013 = 2 years..

25th february 2013 to 25 august 2013 = .5 years..

final attempt will be in Nov 2013..

you article will complete on 24th feb 2014....you should register by 25 march 2011 or else you will have to pay fine