AutoCAD .NET :: Automate Importing Microstation Files

I'm trying to automate importing Microstation files into AutoCad (and then doing interesting things with them).  I'm stuck on the import, as it keeps throwing an "Invalid Argument Exception".

I've thrown empty strings, "hello world" strings, ensured that the string points to a valid file, ensured that the string points to a valid Microstation file... for the scale factor, I've thrown constants, symbolic constants, variable doubles... and where I think the error lies, the insertion point, I've thrown Points, Point 2d's, Point 3d's, arrays of integers, arrays of doubles, and Acad Points, and all of the above even cast as objects.

Supposedly, the signature for import is:

object IAcadDocument.Import(string FileName, object Insertion Point, double ScaleFactor)

but the <object Insertion Point> is throwing me... what kind of object is wanted? The following is a complete working program; you'll just have to add the two autocad references.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
[code]....

(Obviously the intent is not to use hard coded file names, these are for debug purposes. I'm also running as a Windows project rather than a Console project, but the exception is the same.)