JavaScript Uncaught ReferenceError: DualListbox is not defined

Hi, i getting this error on publish aplicattion in C#, in machine dev runs fine, but when i put it in IIS server produtctive gives error, i hope you can help me

Uncaught ReferenceError: DualListbox is not defined

this is code

<div class="col-sm-12">
    <div class="row" id="divDeudores" runat="server" visible="false">
        <div class="col-sm-6 form-group">
            <asp:ListBox ID="lstDeudores" runat="server" SelectionMode="Multiple" class="demo"></asp:ListBox>
        </div>
    </div>
</div>
<link rel="stylesheet" type="text/css" href="../src/dual-listbox.css" />
<script type="text/javascript" src="../src/dual-listbox.js"></script>

<script type="text/javascript">
    new DualListbox('.demo', {
        addEvent: function (value) { },
        removeEvent: function (value) { },
        availableTitle: 'Available options',
        selectedTitle: 'Selected options',
        addButtonText: 'Add (>)',
        removeButtonText: 'Remove (<)',
        addAllButtonText: 'Add All (>>)',
        removeAllButtonText: 'Remove All (<<)'
    });

</script>

<style type="text/css">
    .dual-listbox .dual-listbox__button { margin-bottom: 5px; border: 0; background-color: #0090CB !important; padding: 10px; color: #fff; }
</style>