Neil,

>In fact, all of the errors are involving the newly added security feature. What reference or directive have I neglected to include?

The User business object is found in your business object project's Business.cs file. Open this file and look at the namespace. This is the namespace you need to include in your SecuritySetupForm.cs file.

I'm in the process of enhancing the security setup documentation this week, so that should also help you out!

Regards,