DotNetNuke Configuration Error

I am new to using DNN, I installed the default application locally and tested it, it ran fine. The I uploaded the VS 2003 files, and the SQL database to the server. I try to enter my website and get this error:
DotNetNuke Configuration ErrorDomain Name www.xxxxxx.com Does Not Exist In The Database

DotNetNuke supports multiple portals from a single database/codebase. It accomplishes this by converting the URL of the client browser Request to a valid PortalID in the Portals database table. The following steps describe the process:





1.
Web Server Processing

[*]When a web server receives a Request from a client browser, it compares the file name extension on the target URL resource to its Application Extension Mappings defined in IIS.
[*]Based on the corresponding match, IIS then sends the Request to the defined Executable Path ( aspnet_asapi.dll in the case of ASP.NET Requests ).
[*]The aspnet_isapi.dll engine processes the Request in an ordered series of events beginning with Application_BeginRequest.



2.
Application_BeginRequest ( globals.asax.vb )

[*]The Request URL is parsed based on the "/" character
[*]A Domain Name is constructed using each of the relevant parsed URL segments.

Examples:

URL: http://www.domain.com/default.aspx = Domain Name: www.domain.com
URL: http://209.75.24.131/default.aspx = Domain Name: 209.75.24.131
URL: http://localhost/DotNetNuke/default.aspx = Domain Name: localhost/DotNetNuke
URL: http://www.domain.com/virtualdirectory/default.aspx = Domain Name: www.domain.com/virtualdirectory
URL: http://www.domain.com/directory/default.aspx = Domain Name: www.domain.com/directory


[*]Using the Domain Name, the application queries the database ( Portals table - PortalAlias field ) to locate a matching record.

Note: If there are multiple URLs which correspond to the same portal then the PortalAlias field must contain each valid Domain Name in a comma seperated list.

Example:

URL: http://localhost/DotNetNuke/default.aspx
URL: http://MACHINENAME/DotNetNuke/default.aspx
URL: http://209.32.134.65/DotNetNuke/default.aspx
PortalAlias: localhost/DotNetNuke,MACHINENAME/DotNetNuke,209.32.134.65/DotNetNuke

Note: If you are installing the application to a remote server you must modify the PortalAlias field value for the default record in the Portals table according to the rules defined above.


Please Help!!!!!!! I tried messing with the PortalAlias field, but nothing works.

 

Thankyou for your help, but I am reading the article and have discovered that I have installed to the root directory, I need now to delete everything, create a subfolder and upload the VS files there, it is not allowing me to delete the files from the root directory. I am using the Frontpage tool and there is no subweb created for this application, so now I can't delete, any suggestions on deleting this application and the database and starting fresh.