[Plugin: Contact Form 7] Javascript error when adding tracking code

Hello,

I have added a tracking code to my form following these instructions:

http://contactform7.com/2009/11/24/tracking-form-submissions-with-google-analytics/

An when I send it , no ajax behaviour and the success sent message is not displayed.

This is the exactly code I am adding:

on_sent_ok: "pageTracker._trackEvent('Contacte','[your-name]','[your-email]');"

Can somebody please let me know where the problem can be?

Thank you!

http://wordpress.org/extend/plugins/contact-form-7/