http://bugs.winehq.org/show_bug.cgi?id=34939
--- Comment #10 from Susan Cragin susancragin@earthlink.net 2013-12-03 20:07:40 CST --- (In reply to comment #8)
I remember correctly DN requires .NET 3.5 or 4.0 ... do you use Mono or MS .NET?
Forgot to add... NatSpeak 12.0 and 12.5 use net 4.0.