Tooltip plugin not working?

Hi guys,

I tried following the demo of this jquery tooltip plugin.

And here is what I had done so far.
http://myonlinesmallgroup.com/warren/tooltip/

Unfortunately it did not work.
So where is my mistake?

Thanks in advance.

I already figured it out.
http://myonlinesmallgroup.com/warren/tooltip/index2.php

Okay problem solved.