character animation not connecting in game play

I am new to unity and I am trying to make my player walk, I know, very basic. But I just wanted to play with this portion of unity to get a better understanding. I downloaded Human & Zombie Mobile free added the character with an animator component. I have set up the parameters in the animator for the walk animation and the bool from idle to walk is “IsWalking”. I used the script from the survival shooter project, the video on player character. when I hit play, my character moves correctly and the mouse movies the camera angle but there is no animation when the character moves. What am I doing wrong here?

I actually figured it out a different way, if anyone else is stuck on the basics of mecanim watch this tutorial Unity 4.0 - Mecanim Animation Tutorial - YouTube