Problem: Object doesn't support property or method 'autocomplete'

In master page I wrote:
<script src="../Scripts/MicrosoftAjax.js"></script>
    <script src="../Scripts/MicrosoftMvcAjax.js"></script>
    <script src="../Scripts/jquery-2.1.1.min.js"></script>
    <script src="../Scripts/PersonScript.js"></script>
    <script src="../Scripts/PersonIndexScript.js"></script>
---------------
In Index view I wrote:
...
<link href="../Content/jquery.autocomplete.css" rel="stylesheet" />
    <script src="../Scripts/jquery.autocomplete.min.js"></script>
    <script src="../../Scripts/PersonIndexScript.js"></script>
...
    <input type="text" id="txtSearch" name="query" />
------------------
In PersonIndexScript.js I have:

/// <reference path="jquery.autocomplete.min.js" />
/// <reference path="jquery-2.1.1.intellisense.js" />

$(function () {
    $("#txtSearch").autocomplete("/Person/SearchCandidates",
                                    {minchar : 3});
});
----------
In IE11 I got the error "Object doesn't support property or method 'autocomplete'"
In Chrome and firefox It makes no difference and It doesn't work.