System.Web Missing most all items including "UI" in ASP.NET project PLUS unable to add .NET references.

Hello all.

I'm not sure what is going on here.  I am using VS 2005.  My PC has up to .Net 3.5 SP1 installed.  Here is the process I go through to reproduce my error.

-Open VS 2005 and select Create Website
-Select ASP.NET Website and select my path (File System and Visual Basic are selected)
-The project creates and I'm looking at a blank "Default.aspx"
-I open "Default.aspx.vb" and automatically "Inherits System.Web.UI.Page" has a blue squigly line with an error saying "Type 'System.Web.UI.Page' is not defined"
-I right-click my project and select "Add Reference", the box opens, but I can't go further.

Long story short, I can't add anything in the ".NET" tab.  The error is always "A reference to '#####.dll' could not be added."  I CAN add custom dlls and was able to add a COM reference.

Again, this is a FRESH PROJECT with NO changes made to the ASP.NET website or back-end code.  Also, I CAN add .NET references in a separate Windows Forms VB.NET application.  I have repeated this process several times with the same result.  The project build fails even though I make no changes.

Here is my web.config.  Please Help!

<?xml version="1.0"?>
<!-- 
    Note: As an alternative to hand editing this file you can use the 
    web admin tool to configure settings for your application. Use
    the Website->Asp.Net Configuration option in Visual Studio.
    A full list of settings and comments can be found in 
    machine.config.comments usually located in 
    \Windows\Microsoft.Net\Framework\v2.x\Config 
-->
<configuration>
    <appSettings/>
    <connectionStrings/>
    <system.web>
        <!-- 
            Set compilation debug="true" to insert debugging 
            symbols into the compiled page. Because this 
            affects performance, set this value to true only 
            during development.

            Visual Basic options:
            Set strict="true" to disallow all data type conversions 
            where data loss can occur. 
            Set explicit="true" to force declaration of all variables.
        -->
        <compilation debug="false" strict="false" explicit="true" />
        <pages>
            <namespaces>
                <clear />
                <add namespace="System" />
                <add namespace="System.Collections" />
                <add namespace="System.Collections.Specialized" />
                <add namespace="System.Configuration" />
                <add namespace="System.Text" />
                <add namespace="System.Text.RegularExpressions" />
                <add namespace="System.Web" />
                <add namespace="System.Web.Caching" />
                <add namespace="System.Web.SessionState" />
                <add namespace="System.Web.Security" />
                <add namespace="System.Web.Profile" />
                <add namespace="System.Web.UI" />
                <add namespace="System.Web.UI.WebControls" />
                <add namespace="System.Web.UI.WebControls.WebParts" />
                <add namespace="System.Web.UI.HtmlControls" />
            </namespaces>
        </pages>
        <!--
            The <authentication> section enables configuration 
            of the security authentication mode used by 
            ASP.NET to identify an incoming user. 
        -->
        <authentication mode="Windows" />
        <!--
            The <customErrors> section enables configuration 
            of what to do if/when an unhandled error occurs 
            during the execution of a request. Specifically, 
            it enables developers to configure html error pages 
            to be displayed in place of a error stack trace.

        <customErrors mode="RemoteOnly" defaultRedirect="GenericErrorPage.htm">
            <error statusCode="403" redirect="NoAccess.htm" />
            <error statusCode="404" redirect="FileNotFound.htm" />
        </customErrors>
        -->
    </system.web>
</configuration>

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