Which GS version do you use? It is most probably something older than A6.31.4. I think that you won´t be able to use any kind of shaders with your version. Is it a Sybex version (did conitec ever sell the standart version?)? You´ll most probably have to buy a newer version if you want to use shaders.

Lite-C Tut. 1 Lite-C Tut. 2 Lite-C Tut. 3 (en)
Shader Tutorial (ger)

http://www.slindev.com