teleport = crash?

#include "functions.h"
#include "CA_classes.h"

void hacks()
{

	for(;;)
	{
		while(GetAsyncKeyState(VK_NUMPAD1))
		{
			hover(500.0f);
			Sleep(10);
		}
		Sleep(30);
	}
}

void setup()
{
	DWORD dwClientFxEntry;
	dwClientFxEntry	= (DWORD)GetModuleHandle( "Clientfx.fxd" );
	DWORD dwClass = *(DWORD*)( dwClientFxEntry + 0x66F34 );

	ADR_X = ( dwClass + 0xC8 );
	ADR_Y = ( dwClass + 0xCC );
	ADR_Z = ( dwClass + 0xD0 );
}

bool IsGameReadyForHook()
{
	if( GetModuleHandleA( "d3d9.dll"     ) != NULL 
		&& GetModuleHandleA( "ClientFX.fxd" ) != NULL 
		&& GetModuleHandleA( "CShell.dll"   ) != NULL )
		return true;
	return false;
}

void thread()
{
	while( !IsGameReadyForHook() )
	Sleep(100);
	setup();
	hacks();
}
--------------------------- functions.h ----------------------------------
void hover( float height ) //only function u need to see
{
	*(float*)(ADR_Z) = height;
}