Classifieds contact user form doesnt work


I have a site where people can place classified ads.

The plugin works perfectly but when you want to contact that user who placed the ad, nothing happens. You click on the contact user button (underneath the ad) and it refers to # instead of the contact user form.

You could create an account here to see the issue:

And here are all the ads: Try to click on a ad and contact a user. There you'll see that the contact button doesn't work.

Hope someone could help me out.