Error message when you use SQL Server Management Studio to connect to SQL Server 2005 Integration Services from a client computer: "Connect to SSIS Service on machine '<SSISServer>' failed Access is denied"
Source: Knowledge Base
Product: Microsoft SQL Server 2005 Enterprise X64 Edition & SQL Server 2005 Standard Edition
Notification Contents: New and All Modifications
Error message when you use SQL Server Management Studio to connect to SQL Server 2005 Integration Services from a client computer: "Connect to SSIS Service on machine '<SSISServer>' failed Access is denied"
http://support.microsoft.com/kb/940232/en-US