请问!

<%@ Page language="c#" Codebehind="WebForm1.aspx.cs" AutoEventWireup="false" Inherits="WebAppli.WebForm1" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
<HEAD>
<title>WebForm1</title>
<meta content="Microsoft Visual Studio .NET 7.1" name="GENERATOR">
<meta content="C#" name="CODE_LANGUAGE">
<meta content="JavaScript" name="vs_defaultClientScript">
<meta content="http://schemas.microsoft.com/intellisense/ie5" name="vs_targetSchema">
<script language="C#" runat="server">
public void Page_load(Object source,EventArgs E)
{
     TextBox1.Text = "sfsf";
}

</script>
</HEAD>
<body MS_POSITIONING="GridLayout">
<form id="Form1" method="post" runat="server">
<FONT face="宋体">
<asp:textbox id="TextBox1" style="Z-INDEX: 101; LEFT: 344px; POSITION: absolute; TOP: 72px" runat="server"></asp:textbox><asp:button id="Button1" style="Z-INDEX: 102; LEFT: 424px; POSITION: absolute; TOP: 136px" runat="server"
Text="Button"></asp:button><INPUT id="text3" style="Z-INDEX: 103; LEFT: 192px; POSITION: absolute; TOP: 104px" type="text"></FONT>
</form>
</body>
</HTML>
这个代码的C#脚本怎么不执行啊？没反应，一些关健字根本不变色！