Hey Everybody,

I have fought with this all day.  Another guy I know had this thing running in 5 minutes after downloading it and I just can't seem to make it work. 
I get to the "Configure Database Connection" part of the Install Wizard and I select the "file" option..  When I test the connection, I get these 3 errors:

Connection Error(s):
Index #: 0
Source: .Net SqlClient Data Provider
Class: 11
Number: 4064
Message: Cannot open user default database. Login failed.

Index #: 1
Source: .Net SqlClient Data Provider
Class: 14
Number: 18456
Message: Login failed for user 'DESIGN\ASPNET'.

Index #: 2
Source: .Net SqlClient Data Provider
Class: 0
Number: 5111
Message: File activation failure. The physical file name "C:\buffer\sandbox\App_Data\Database_log.ldf" may be incorrect.

Here are my connection strings.

For the record, permissions are correct.

I'm about to give up.  The guy next door didn't have to touch a damn thing.

What am I missing?

<connectionStrings>
    <!-- Connection String for SQL Server 2005 Express -->
    <add name="SiteSqlServer" connectionString="Data Source=.\SQLExpress;Integrated Security=True;User Instance=True;AttachDBFilename=|DataDirectory|Database.mdf;" providerName="System.Data.SqlClient" />
    <!-- Connection String for SQL Server 2000/2005
    <add
      name="SiteSqlServer"
      connectionString="Server=(local);Database=DotNetNuke;uid=;pwd=;"
      providerName="System.Data.SqlClient" />
   -->
  </connectionStrings>

 <!-- Connection String for SQL Server 2005 Express - kept for backwards compatability - legacy modules   -->
    <add key="SiteSqlServer" value="Data Source=.\SQLExpress;Integrated Security=True;User Instance=True;AttachDBFilename=|DataDirectory|Database.mdf;" />
    <!-- Connection String for SQL Server 2000/2005 - kept for backwards compatability - legacy modules
    <add key="SiteSqlServer" value="Server=(local);Database=DotNetNuke;uid=;pwd=;"/>

If I try to start from scratch, database.mdf is "in use" and I have to manually kill sql related processes in order to delete everything and start over again...so something has opened the file.