IK Pass - Question.

Hello guys,

I have been watching the Stealth Tutorial - particularly the part of the series dealing with enemies, so, I've jumped ahead quite a bit and may have missed something important.

I am up to tutorial 402, @ approx 9:42, and the narrator says, "we want the enemies arm to point at the player while it is shooting. We are going to do this by IK, so make sure you check the IK Pass box at the bottom of the layer".

Anyway, I tried scrolling the "Layer" drop down menu as per the video and the "IK Pass" check box wasn't there. And neither was the Sync checkbox also seen in the vid.

So, I would like to know if this will cause a problem w/ the version of Unity I am using for this tutorial 4.6.1f? And, if so, what can I do to correct it? This is very, very heady stuff to me and I'm fairly certain that if this was to cause a problem I wouldn't know how to correct it .

To anyone who can help here is a big thankyou in advance!

Regards,
CK.