Problems using Mecanim Animation

Hi all, i am new to unity 3d and just completed learning the basics and started animation. I am seeing at a tutorial in you tube tutorial about "Mecanim Animation " and started working in that way.This is the link which i am seeing.

"http://www.youtube.com/watch?v=Xx21y9eJq1U"

My main intenstion was to import a charcacter and animation into unity and assign a keyboard shortcut to that animation.

These are the steps which i am doing.

1.Created a folder named character and imported .fbx charactr model file exported from iclone.

2.Created a folder named Animations and imported as .fbx files into unity

3.opened animator tab from window

4.Created a animation controller to the character and assigned it to the controleer tab animator tab which is present in the inspector panel

5.drag and dropped my idle motion into the animator tab

6.Created a bleand tree,made the transitions and connections as shown exactly in tutorial

7.but after that i am not able to see the blend shape animation in preview tab in the inspector window, the character is just standing in t pose.Below that i am getting a

text saying "-21474683648....(-infinity)

whats was going wrong ?

can any one help me.please

Regards Suresh