Debugging a CorelDESIGNER plug-in using C++

Hi,

I'm building a prototype C++ plug-in for CorelDESIGNER using COM/C++ 

There is a great how to article over at oberonplace, http://forum.oberonplace.com/showpost.php?p=7073&postcount=7

But I'm having problems debugging my prototype.  Whenever I start or attach to Designer.exe with the Visual Studio debugger the process starts hitting debugger interrupts and throwing exceptions.  Eventually the process hangs.

Any one have any ideas?   Is there some known workaround for this behaviour?  Is there a special debugging version of Deisgner that I need?

Any pointers or tips would be greatly appreciated!

Cheers,

Josh