ASP.Net/AJAX - MasterPage and jQuery

Hi I am using the jquery calender in my pages, with the masterpage included. i have no problem to show the calender in simple aspx pages, but have problem if i include the master page in. i have try several ways in internet yet have no idea on the problem exist, this is my code referen,any help will be appriciated




<%@ Page Language="C#" AutoEventWireup="true" CodeFile="jj.aspx.cs" MasterPageFile ="~/EHS_CAS.master" Inherits="test_jj" %>
<asp:Content ID="Content2" runat="server" ContentPlaceHolderID="ContentPlaceHolder1">
<link type="text/css" href ='<%= ResolveUrl("Dp/css/smoothness/jquery-ui-1.7.1.custom.css") %>' rel="stylesheet" />
<script src='<%= ResolveUrl("Dp/_scripts/jquery-1.3.2.min.js") %>' type="text/javascript"></script>
<script src='<%=ResolveUrl("Dp/_scripts/jquery-ui-1.7.1.custom.min.js") %>' type="text/javascript"></script>
<script type="text/javascript">
$(function() {
$('#<%= txtDate.ClientID %>').datepicker();
}
</script>
<div>
<asp:TextBox ID="txtDate" runat="server"></asp:TextBox>
</div>

</asp:Content>





Thanks in advance.