Well, a bit more information. I have found a server with SQL Server 2000, windows 2000 and MSDTC 3.00.00.3535. I have tried running a package enlisting DTC on this server connecting via an OLEDB connection this time using Windows Authentication....and I still have the issue

So this appears to be an issue with SSIS and MSDTC 3.00.00.3535. Unfortunately a google on this Gave me a Googlewhack on my on post on this forum 😀