free version loadapp hellocsharp unsigned only signed and authenticated

Greetings,

The API help file provides a section on "Creating a C# add-in for free version of DraftSight" ..

I applied the code, built the dll, then applied REGASM on the copy (workstation with free version installed)

When I try to LOADAPP on the free version I get this message:

An unsigned add-in, HelloCSharp, has been detected and will not be loaded. Only signed and authenticated add-ins are permitted.

What have I missed?

Thx.

Kevin.