FIX: The process stops responding when you run an SSIS package that contains a Flat File destination in x64 versions of Microsoft SQL Server 2005
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Source: Knowledge Base
Product: Microsoft SQL Server 2005 Enterprise X64 Edition
Notification Contents: New and All Modifications
FIX: The process stops responding when you run an SSIS package that contains a Flat File destination in x64 versions of Microsoft SQL Server 2005
http://support.microsoft.com/kb/942666/en-US