Conditional Field Contact Form 7 Not Working

Hi,

I was able to install the Contact Form 7 plugin which is working. However Im looking to apply conditional fields and came across this plugin, Conditional Fields Contact Form 7 (http://bdwm.be/wpcf7cf/how-to-set-up-conditional-fields-for-contact-form-7/) and it seems the conditional fields are not hiding as it is supposed to. If you refer to my test form (contact form 1) on this page: http://www.ainterpreting.com/cases/

Any suggestions on how to resolve this?