Add the IP address as a portalAlias too, perhaps that will help.

Make sure the connectionStrings work on your server.

I'll paste this here too, you'd do this on your server and put in web.config, etc., hope it helps:

http://www.sqlstrings.com/SQL-Server-connection-strings.htm

I suggest a "Trusted Connection" for "Integrated Security" instead of putting a username and password in your web.config (not as secure). This will allow the 'NETWORK SERVICE' or 'ASPNET' user that you've given permission on the webserver for your site's db and virdir (db owner and virdir full control).

You can generate specific ADO connections and connection strings this way:

1. Create a text file and save it with the extension of ".udl" (.UDL).
2. Open the new file by double-clicking through file explorer, for example
3. the .UDL extension will be opened by 'Data Link Properties' dialog
4. use this to create a connection to your database
5. in this utility, find the connection string text line and copy it to your clipboard to use