why i cant kill the alpha ceph in crysis 3

[Ballistic147]

Im playing Crysis3 on windows 8.1 and i am at the alpha ceph battle but the problem is that hes not taking effect and i saw how to kill him and i did everything but it doesnt
works,please give my an answer

 

[clutchc]

Lol... that's where I quit too. But in my case it was purely my lack of dexterity and ability.