Windows Server 2003 Web Edition is designed to build and host Web-based applications and Web services. It does NOT support enterprise applications. If you must install and run enterprise applications, install Windows Server 2003 Enterprise Edition.
For additional information about Windows Server 2003 Web Edition, see http://microsoft.com/windowsserver2003/evaluation/overview/web.mspx.
See Microsoft Knowledge Base article
PRB: Windows Server 2003 support for SQL Server 2000.