jQuery ui with node.js server

hi everyone am developing web application in node.js using jquery in client side , its loaded when client serve any page but when i using any ui function its not work .

if i test it out side my app its work !!

my folder structure : app.js

view folder conten: index.ejs workspace.ejs js folder contan: jquery and jquery ui

and my include code is like this in workspace.ejs

<script  src="/js/jquery-ui.js"></script>
<script  src="/js/jquery.js"></script>