I got a similar error with my VB application trying to run it on a machine that doesn't have the the runtime library installed.
Is this happening when running the app via the IDE?
Another think is to check that the App Assembly info hasn't changed. If so re-run the Authenticator and re-add the .dgdk file generated.
Another thing to check is that when you cut and pasted the init string, you didnt leave off any characters by accident.
Jas
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"What is this talk of 'release'? Klingons do not'release' software. It escapes leaving a bloody trail of developers and quality assurance people in its wake!"