[RESOLVED] TreeView not working outside of VWD

Running the application through visual web developer and it works fine. But through local host or remotely, I get the following error:

Server Error in '/' Application.
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Parser Error Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately.

Parser Error Message: Could not load type System.Web.UI.WebControls.SiteMapDataSource from assembly System.Web, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a.

Source Error:

Line 7: <body>
Line 8: <form runat="server">
Line 9: <asp:SiteMapDataSource ID="mySiteMapDataSource"
Line 10: runat="server" />
Line 11: <asp:TreeView ID="myTreeView" runat="server"

Source File: c:\inetpub\wwwroot\sitemap_and_tree_view\TreeViewDemo.aspx Line: 9

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Version Information: Microsoft .NET Framework Version:1.1.4322.2379; ASP.NET Version:1.1.4322.2379

The code in the page:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"

"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

<html>

<head>

<title>TreeView Demo</title>

</head>

<body>

<form runat="server">

<asp:SiteMapDataSource ID="mySiteMapDataSource"

runat="server" />

<asp:TreeView ID="myTreeView" runat="server"

DataSourceID="mySiteMapDataSource" />

</form>

</body>
</html>

The sitemap file code:

<siteMap

xmlns="http://schemas.microsoft.com/AspNet/SiteMap-File-1.0">
<siteMapNode title="Home" url="~/Default.aspx"

description="Home">
<siteMapNode title="TreeViewDemo" url="~/TreeViewDemo.aspx"

description="TreeView Example" />
<siteMapNode title="ClickEvent" url="~/ClickEvent.aspx"

description="ClickEvent Example" />
<siteMapNode title="Loops" url="~/Loops.aspx"

description="Loops Example" />
</siteMapNode>

</siteMap>

I'm at a loss as it appears it's exactly as the book describes it.