Hi and thanks for your reply

I'm coding in VB.NET and using VSTO.

The code references never go out of scope. It's almost like some references
go out of scope inside of Outlook. As you may already be aware,
BeforeFolderMove is a newly added event handler in Outlook 2007 and I believe
it has bugs.

Read this page, Sue Mosher (Outlook MVP) suggests that Microsoft are aware
of a problem with it.

http://windows-tech.info/16/0489b30f5a7eac94.php

Thanks