Same for me.
I installed the OpenAL library through the installer. Crashed.
I copied OpenAL libraries from other games that use it sucessfully (Vavoom, Doomsday, Scorched3D, VegaStrike) into the PlaneShift folder and the Windows system folder - no change.
For Windows, I successfully use DirectShow, and for Linux Software instead now.
My system: Windows 2000 SP4 Rollup 2, TerraTec DMX Xfire 1024.