stuck on OpenAL

[rustyboy]

Hi, I wonder if you guys can offer a second pair of eyes on this. I am writing a basic audio library (container as opposed to function library)

syntax error : identifier 'AudioLibrary' line 89

I can't see why since it doesn't have a problem with my includes.
NB I'm using VS2008

#pragma once
#include "./Frame.h"
#include "./AudioLibrary.h"
#define MAX_FRAMES 10

class Troop
{

	SoundGroup* soundGroup;//Sound collection to use
        //struct declared in AudioLibrary.h

public:
	Troop(void);
	~Troop(void);


	void getSounds(AudioLibrary* audioLib);//C2061
};

[guestgulkan]

Where is the AudioLibrary type declared/defined?? In AudioLibrary.h ??