I've just installed mojoPortal 2.1.4 on Windows Server 2003 & SQL Server 2000.
During the installation I forgot to provide the required NTFS rights to the /data folder. The error message on the screen reminded me to do this: "You need to make the Data folder and all its children writable by the ASP.NET worker process. ASPNET on XP, IISWPG on Win2003".
The bug is that in Windows Server 2003 this user is called "IIS_WPG". Please, correct the exception message.