[Openal] OpenAL Soft's alcOpenDevice returns null

[Stephen A]

Hello,

I still haven't been able to find a solution to this problem. I have tried  
the following combinations with no success:

WinXP (32bit): openal-soft 1.3.253 built with Visual Studio 2008
Vista (64bit):   openal-soft 1.2.218 built with Visual Studio 2005 and 2008

Directsound is enabled in all builds (at least, that's what CMake is  
reporting). However, only the "Wave File Writer" device is enumerated, and  
alcOpenDevice always returns NULL.

Any ideas? Anything I can do to help debug the issue?