new player class and datablock don't load

Hi,

I wrote two new classes extending ShapeBase and ShapeBaseData but it don't load at all in the datablock editor.
I got the message "unable to create class AMHPlayer with datablock, starting as observer"

AMHPlayer.h

#ifndef _AMH_PLAYER_
#define _AMH_PLAYER_

#ifndef _SHAPEBASE_H_
#include "T3D/shapeBase.h"
#endif

struct AMHPlayerData :
	public ShapeBaseData 
{
public:
	typedef ShapeBaseData Parent;
	DECLARE_CONOBJECT(AMHPlayerData);

   static void initPersistFields();

};


class AMHPlayer :
	public ShapeBase
{
public:
	typedef ShapeBase Parent;

	DECLARE_CONOBJECT( AMHPlayer );

protected:
	AMHPlayerData * m_AMHPlayerData;

	// accessors
public:
	inline AMHPlayerData * getData() { return m_AMHPlayerData; }
	inline void setData(AMHPlayerData * Data) { m_AMHPlayerData = Data; }

public:
	void processTick(const Move * move);

public:
	AMHPlayer(void);
	~AMHPlayer(void);
};

#endif

AMHPlayer.cpp

/*
*/

#include "AMHPlayer.h"

IMPLEMENT_CO_DATABLOCK_V1(AMHPlayerData);

IMPLEMENT_CO_NETOBJECT_V1(AMHPlayer);

void AMHPlayerData::initPersistFields()
{
}

void AMHPlayer::processTick(const Move * move)
{
	Con::printf("AMHPlayer is moving");
}

AMHPlayer::AMHPlayer(void)
{

}


AMHPlayer::~AMHPlayer(void)
{
}

amhplayer.cs in game/art/datablocks excuted from datablockExec.cs

datablock AMHPlayerData(DefaultAMHPlayerData)
{
}