jquery Autocomplete not working

jquery Autocomplete not working

I am using jquery  jquery-1.4.4.js and  jquery.ui.autocomplete.js.  My code is as follws but there is no  autocomplete pop up appearing.
 

  1. <script src="@Url.Content("~/Scripts/jquery.autocomplete.js")" type="text/javascript"></script>

    <

    p><input type="text" id="tags" autocomplete="on"/></p>

    <

    script type="text/javascript">

    $(

    function () {

    var availableTags = [

    "ActionScript",

    "AppleScript",

    "Asp",

    "BASIC",

    "C",

    "C++",

    "Clojure",

    "COBOL",

    "ColdFusion",

    "Erlang",

    "Fortran",

    "Groovy",

    "Haskell",

    "Java",

    "JavaScript",

    "Lisp",

    "Perl",

    "PHP",

    "Python",

    "Ruby",

    "Scala",

    "Scheme"

    ];

    $(

    "#tags" ).autocomplete({

    source: availableTags

    });

    });

     

    </script>