Ok, I've uninstalled and reinstalled the latest 3/31 version of MM.

I've added the Win Forms project to my solution so I can put a breakpoint in the mmBusiness

I get the following when I build:

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The following module was built either with optimizations enabled or without debug information:

C:\windows\assembly\GAC_MSIL\Oakleaf.MM2008.Winforms\3.5.0.0__57ceb69243304587\OakLeaf\MM2008.WinForms.dll

To debug this module, change its project build configuration to Debug mode. To suppress this message, disable the 'Warn if no user code on launch' debugger option.
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Of course, I've looked at the project and all the settings (Debug) are correct. Bottom line is that I cannot trace through the MM Framework code to see what the problem is when I run through the last step in the Jump Start for Windows Forms.

I'm leaving, as the Jump Start says, the customer id field blank to throw the error and instead it blows up with the error and stack trace in the first message of this thread.

Basically, this is a showstopper for me - not being able to trace and figure this problem out, which I suspect isn't my problem in the first place since I believe that I faithfully followed every step of the Jump Start.