Help please, animated smartclip navigation

Can anyone help me please.
I have completed the tutorial however, can not get my buttons to lead anywhere.
I have added an invisible button with actionscript for get url above the buttons, but they still dont work.

Any suggestions?
I have attached .fla file.
thank you…
by the way, I was following this tutorial:
http://www.kirupa.com/developer/mx2004/ani_smartclipnav2.htm