SAPI 5.1 and C# , please Help

Question

Hello!

Reading the article http://www.c-sharpcorner.com/Code/2004/May/SpeechRecognition.asp 
by Suhil Srinivas from May 2004, running the included example 'SpeechTest.zip'.
I am using 'Microsoft Visual C# Express Edition' but I do get an Error saying that the 'SpeechLib' library cannot be found. I can see the file 'Interop.SpeechLib.dll' in my obj-directory that came with zip-file.

Am I missing the obivious here ?
Why is my example not working ?

I really want to be able to do a little GUI application using C# and SAPI 5.1
in a quick and dirty way, see if I can get into the air in a short time and then propagating
C# for my java friends.

Hope that you can give me a hand.
 Best regards, Ink

ps.
the error I get is the following:
"Warning 8 Cannot load type library for reference "SpeechLib".
Biblioteket är inte registrerat.
(Exception from HRESULT: 0x8002801D (TYPE_E_LIBNOTREGISTERED)) SpeechTest"

Wherer the Swedish sentence 'Biblioteket är inte registrerat.'
translates to English 'The library is not registered'
ds.