I'm having a lot of difficulty in getting DNN up and operational on a W2K Adv Server.  I've never installed this before.  Here is my environment:

W2k Adv Server, IIS, SQL Express 2005

I keep getting the following error:

A connection was successfully established with the serever, but then an error occurred during the login process.  (provider:  Shared Memory Provider, error: 0 No process is on the other end of the pipe). 

Here are my connection lines from web.config

<add
      name="SiteSqlServer"
      connectionString="Data Source=appsrv2\SQLExpress;Integrated Security=True;User Instance=True;Initial Catalog=DotNetNuke2;user id=xxx;password=xxx;AttachDBFilename=|DataDirectory|Database.mdf;"
      providerName="System.Data.SqlClient" />

add key="SiteSqlServer" value="Data Source=appsrv2\SQLExpress;Integrated Security=True;User Instance=True;Initial Catalog=DotNetNuke2;user id=xxx;password=xxx;AttachDBFilename=|DataDirectory|Database.mdf;"/>

Please forgive the newbie stupidity if this is an easy fix, but I'm banging my head against the wall on this.