Microsoft SQL Server 2005 - 9.00.1399.06 (Intel X86) Oct 14 2005 00:33:37
Copyright (c) 1988-2005 Microsoft Corporation Standard Edition on Windows NT 5.1
(Build 2600: Service Pack 2)
That's just what I thought.
Your SQL Server version is RTM (no Service Pack). You can recognize it from the build version 9.00.1399.
The Service Pack information you see is for the Windows operating system. So install the SQL Server Service Pack and your problem should be solved.