Problems Launching Black Plague Demo

[DanteDMC]

I've downloaded and installed the Black Plague Demo and was thrilled to play it; but, when I tried to open it all I get is;

"The procedure entry point alSource3i could not be located in the dynamic link library OpenAL32.dll."

I've tried re-installing the game with and without open AL and I've installed the updated open AL as well. I tried removing the .dll from the game folder and I still get the same results; heck, I've even tried it with older versions of the .dll and still get the same results.
I'm going to try updating my sound card drivers (Realtek HD codec), although I'm fairly sure that won't help, please can some one help me!?