Problems with AD7730 resolution in a weighing system design

#include <avr/io.h> 	
#include <avr/interrupt.h>
#include <avr/pgmspace.h>
#include <math.h>
#include <inttypes.h>
#include <util/delay.h>
#include <string.h>
#include <stdlib.h>
#include <avr/signal.h>
#include "SPI_routines.h"
#include "UART_routines.h"

#define ADE_ASSERT() PORTB |= 0x10;
#define ADE_DEASSERT() PORTB &= 0xEF;

#define STATUS 0
#define DATA 1
#define MODE 2
#define FILTER 3
#define DAC 4
#define OFFSET 5
#define GAIN 6
#define TEST 7

char Print_Data[10];
unsigned int count;


int main(void){

	unsigned int read_data,count;
	unsigned int a,i;

	DDRA = 255;
	DDRB = 255;
	PORTB = 0x00;		// ADE7753 Reset pin set low

	// Initializations
	uart0_init();
	spi_init();
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
	// ADE7753 Reset and CS ON
	ADE_ASSERT()
	PORTB = 0x08;		// ADE7753 Reset pin pulled high
	_delay_ms(100);
	ADE_DEASSERT()		// ADE7753 CS pin pulled low
	_delay_ms(100);

while(1)
	{
	PORTA = 0x00;
	_delay_ms(200);
	_delay_us(200);

	PORTA = 0x80;		//Check LED at PORTA
	_delay_ms(200);
	_delay_ms(200);


	SPI_transmit(0x04);	//Send DAC Write Command - Write to the communication Register
	_delay_us(1);
	SPI_transmit(0x10);	//Write 16 to the DAC Register
	_delay_us(1);

	SPI_transmit(0x14);	//Send DAC Read Command - Write to the communication Register
	_delay_us(1);
	count = SPI_receive();	//Read DAC Register

	itoa(count,Print_Data,10);//Print Count value, if 16 then SPI working properly
	transmitString(Print_Data);
	transmitString("\t");
	transmitString("CBC \r\n");

	}
}