Problem defining jsPlumb

<%@ Page Title="Home Page" Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true"
    CodeBehind="Default.aspx.cs" Inherits="SegmentManager._Default" %>

<asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent">
    </asp:Content>
<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
    <h2>
        Welcome to Segment scaling management system!</h2>
    <h3>  
        
        <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.0/jquery.min.js"></script>

        <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.9.2/jquery-ui.min.js"></script>

        <script type="text/javascript" src="Scripts/jquery.jsPlumb-1.5.4.js"></script>
        <script type="text/javascript">

            jsPlumb.ready(function () {
            //perform operation only after DOM is loaded  

            var e0 = jsPlumb.addEndpoint("container0"),

                e1 = jsPlumb.addEndpoint("container1");
                jsPlumb.connect({ source: e0, target: e1 });

            });
        </script>
    
    </h3>
</asp:Content>