zclip copy text to clipboard not working

Question

I have this in .jade:

.col-md-9
    h4#enquiry-details Enquiry Details
.col-md-1
    a#copy-enquiry(href='#') Copy

Then in my javascript:

$(document).ready(          
    function() {
        $('a#copy-enquiry').zclip({
            path:'/javascripts/ZeroClipboard.swf',
            copy:$('h4#enquiry-details').text(),
         });
     }
);

I have included the jquery and jquery.zclip.js script in my header.

Somehow the copy to clipboard still not working. Any ideas?