FIX: Error message when you run a maintenance plan that contains a Back Up Database task in Microsoft SQL Server 2005 Service Pack 2: "0x80004003: Object reference not set to an instance of an object"
The following pages were recently modified.
Source: Knowledge Base
Product: Microsoft SQL Server 2005 Enterprise X64 Edition, SQL Server 2005 Enterprise Edition & SQL Server 2005 Standard Edition
Notification Contents: New and All Modifications
FIX: Error message when you run a maintenance plan that contains a Back Up Database task in Microsoft SQL Server 2005 Service Pack 2: "0x80004003: Object reference not set to an instance of an object"
http://support.microsoft.com/kb/938913/en-US