Writing sustom WinFS Shell Namespace Extension

Good evening, Dear WinFS Team,

You rock guys, in fact! WinFS Beta 1 Refresh is full of excellent things to
work on but there some issues also with SDK documentation where some code
parts that would be written in C# are written in something like combination
of C# and VB.NET in one language that looks more like C#. But that is BTW.
The problem is:

I had written some sample apps that work with Contacts that user will work
with - something like Personal Contacts Manager. That was really good
experience for me so I tried to create Windows Shell Namespace Extension to
work with this data through Windows Explorer instead of my custom apps
written in C#.

So I looked around and fond an excellent implementation for .NET of Windows
Shell. I can now create shell extensions (the goal is nearby "WinFS Stores"
extension) but when I'm trying to create an extension that would list some
data from WinFS explorer doesn't return any data and also all look like that
nothing happen.

Windows Shell (packed as WindowsShell.dll, a tool to create Windows Shell
Namespace Extensions with .NET CLR) helps me in creating everything but when
I try to initialize folder of userData Windows Explorer stops!

What's up?

As you wrote WinFS Shell Namespace Extension hope you'll give me an
approtiate answer!

Thanks!