Hi-Tech PIC Compiler Error, Cannot Find Header File

#include <htc.h>
#include "delay.h"
#define _XTAL_FREQ 8000000
void main()
{
  TRISB=0X00;
  PORTB=0X00;
  while(1)
  { 
    PORTB=0XFF;
    _delay_ms(100);
    PORTB=0X00;
    _delay_ms(100);
  }
}

#include "delay.h"

#include <delay.h>

#include <htc.h>
//#include "delay.h"
#define _XTAL_FREQ 8000000
void main(void){
	TRISB=0X00;
	PORTB=0x00;
	while(1)
	{
		PORTB=0xFF;
		__delay_ms(100);
		PORTB=0x00;
		__delay_ms(100);	
	}
}

/*
 *	Delay functions
 *	See delay.h for details
 *
 *	Make sure this code is compiled with full optimization!!!
 */

#include	"delay.h"

void
DelayMs(unsigned char cnt) {
	unsigned char i;
	while (cnt--) {
		i=4;
		while(i--) {
			DelayUs(uS_CNT);	/* Adjust for error */
		} ;
	} ;
}

/*
 *	Delay functions for HI-TECH C on the PIC18
 *
 *	Functions available:
 *		DelayUs(x)	Delay specified number of microseconds
 *		DelayMs(x)	Delay specified number of milliseconds
 *
 *	Note that there are range limits: 
 *	- on small values of x (i.e. x<10), the delay becomes less
 *	accurate. DelayUs is accurate with xtal frequencies in the
 * 	range of 4-16MHZ, where x must not exceed 255. 
 *	For xtal frequencies > 16MHz the valid range for DelayUs
 *	is even smaller - hence affecting DelayMs.
 *	To use DelayUs it is only necessary to include this file.
 *	To use DelayMs you must include delay.c in your project.
 *
 *	Set the crystal frequency in the CPP predefined symbols list
 *	on the PICC-18 commmand line, e.g.
 *	picc18 -DXTAL_FREQ=4MHZ
 *
 *	or
 *	picc18 -DXTAL_FREQ=100KHZ
 *	
 *	Note that this is the crystal frequency, the CPU clock is
 *	divided by 4.
 *
 *	MAKE SURE this code is compiled with full optimization!!!
*/

#define	MHZ	*1

#ifndef	XTAL_FREQ
#define	XTAL_FREQ	4MHZ		/* Crystal frequency in MHz */
#endif

#if	XTAL_FREQ < 8MHZ
#define	uS_CNT 	238			/* 4x to make 1 mSec */
#endif

#if	XTAL_FREQ == 8MHZ
#define uS_CNT  244
#endif

#if	XTAL_FREQ > 8MHZ
#define uS_CNT  246
#endif

#define FREQ_MULT	(XTAL_FREQ)/(4MHZ)

#define	DelayUs(x)	{ unsigned char _dcnt; \
			  if(x>=4) _dcnt=(x*(FREQ_MULT)/2); \
			  else _dcnt=1; \
			  while(--_dcnt > 0) \
				{\
				asm("nop");\
				asm("nop");\
				continue; }\
		} 

extern void DelayMs(unsigned char);