OpenAL problem - channel limitations

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GfK

I've just started using OpenAL for audio in my game since it seems to be the only thing that works in Vista (i'm coding under XP as I don't have my own copy of Vista).

There seems to be a limit of 14 (0-13) active channels when using OpenAL. Try this code. You'll see I'm using a bank of 24 allocated channels over and over. Using the example below, nothing plays on channel 14 or beyond. Why?:

Graphics 800,600

result = SetAudioDriver("OpenAL")
If Not result Then RuntimeError("Could not open OpenAL driver!")

Global MaxChans% = 24
Global chan:TChannel[MaxChans]
Global chanPtr:Int = 0

initchannels()

Global snd = LoadSound("C:\Program Files\BlitzMax\samples\hitoro\sounds\fall.ogg")
While Not KeyDown(key_escape)
	Cls
	playSnd(snd)
	DrawText "Attempting to play channel " + chanPtr,10,10
	Flip
	Delay 500
Wend

Function initChannels()
	For N = 0 To maxChans-1
		chan[N] = AllocChannel()
	Next
End Function

Function playSnd(hnd:TSound,rate:Float = 1,Pan:Float = 0)
	chanPtr:+1
	If chanPtr>maxChans-1
		chanPtr = 0
	EndIf
	CueSound(hnd,chan[chanPtr])
	SetChannelRate chan[chanPtr],rate
	SetChannelPan chan[chanPtr],Pan
	SetChannelVolume chan[chanPtr],1
	ResumeChannel chan[chanPtr]
End Function

This code works perfectly when using FreeAudio. Is there a way to fix this limitation? Is it a bug with Blitzmax?