新手的菜问题,为什么提示BC30451: Name 'data_src' is not declared.

照书上的例子写下来.运行时提示错误,是什么原因啊.在线等..
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<%@ import namespace="system.data"%>
<%@ import namespace="system.data.oledb"%>
<script language="vb" runat="server">
sub page_load(sender as object,E as eventArgs)
dim objConnection as OleDbConnection
dim strConnect as String
dim strCommand as String

strConnect = "Provider=Microsoft.Jet.OLEDB.4.0;"
strConnect = "Data Source=E:\Myproject\db"
strConnect = "myaccont.mdb;"
strConnect = "Persist Security Info=False"
data_src.text = strConnect

objConnection = new OleDbConnection(strConnect)

try
objConnection.open()
con_open.text = "connection opened successfully.<br/>"
objConnection.Close()
con_close.text = "connection closed.<br/>"
catch e as exception
con_open.text="connection failed to open.<br/>"
con_close.text = e.ToString()
end try
end sub</script><html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
</head>
<body>
<h4> Testing the data connection
<asp:Label id="con_src" runat="server" /></h4>
<asp:Label ID="con_open" runat="server"/>
<asp:Label ID="con_clse" runat="server"/></body>
</html>