Yes, I am a newb and I suppose that the answer to this problem is posted somewhere very obvious.  But as a newb I declare my natural right to not see the obvious.  Here goes with the stupid question.

Having many domains to create portals for I attempted to setup individual installations of DNN 4.5.5 for three domains.  On the first installation I accepted the default user names of host and admin.  All was well.  On the second installation I modified those default account names on a whim.  All was well.  As fate was in a mood to  have its way with me, upon installation of the thrid portal I again used the default user names Admin and Host.  Oh whoa... I can no longer log into my first portal.  I could just blow it away and reinstall it but would much prefer to know how to fix it.

Any one?  Any one?

If you help ... Thank You.

That puzzelled me too.  I searched the database tables looking for a hint as to how the passwords might be stored and found nothing.  I created seperate databases for each installation naming them slightly differently, i.e., dnnDomainName.  So, I knew that would likely not be the source of the problem, however; I did notice a database oddity.  I have SQL 2000 installed and create my databases there, however; I also have a trial version of SQL 2005 and it appears that the applications may be touching that installation?  I have no experience with any SQL systems beyond SQL 2000.  Does DNN access the SQL 2005 database in some way even though I have not instructed it to do so?  Nowhere have I specified an account or password giving it access to that database but I suppose it might be able to uses a system accout?

Can you tell me how the passwords are stored and how they might interfere with each other outside the SQL 2000 databases?  The connectionstrings for the databases are as follows (without the passwords of course)

Domain 1 - http://dotnetnuke.mcwhirter.info
  <!-- Connection String for SQL Server 2005 Express -->
    <add name="SiteSqlServer" connectionString="Data Source=.\SQLExpress;Integrated Security=True" providerName="System.Data.SqlClient" />
    <!-- Connection String for SQL Server 2000/2005
    <add name="SiteSqlServer"  connectionString="Server=(local);Database=dnn_DotNetNuke_McWhirter_Info;uid=dnnUser01;pwd=*******;" providerName="System.Data.SqlClient" />
  -->

Domain 2 - http://publishing.McWhirter.US
  <!-- Connection String for SQL Server 2005 Express -->
    <add name="SiteSqlServer" connectionString="Data Source=.\SQLExpress;Integrated Security=True" providerName="System.Data.SqlClient" />
    <!-- Connection String for SQL Server 2000/2005
    <add name="SiteSqlServer" connectionString="Server=(local);Database=dnn_Publishing_McWhirter_US;uid=dnnUser02;pwd=*******;" providerName="System.Data.SqlClient" />
  -->

As you see they use different databases.  So please explain how passwords are handled and how in this environment one installation might affect another.

Thank You.

They're not connected. The three separate installs should work independently and it should not matter at all what names you chose for host and admin. My feeling is that something else went wrong... blow it away and try again. Double-check the three connection strings, .Net app versions, domain pointers.. all the bits. It's easy to make a minor mistake.

Rob