Problem with ADC

HI,
I have a problem.The code brought following should insert, with an interval of time defined in "T3", in a vector, Result [NUM], 100 values from the channel 0 of the converter A/D.
Subsequently he should calculate the average of these 100 values and then to send them to the serial port to stamp them to monitor.

#pragma large

/*#include <c167cs.h>
/*#include <intrins.h>*/
#include <REG167.H>
#include <stdio.h>
#define NUM 100

unsigned int Result[NUM], media, somma;
unsigned char count;


void main (void) {

  /* init serial0 port: */
  P3  |= 0x0400;          /* set port 3.10 output latch (TXD)    */
  DP3 |= 0x0400;          /* configure port 3.10 for output      */
                          /* operation. ( TXD output)            */
  DP3 &= 0xF7FF;          /* configure port 3.11 for input       */
                          /* operation. ( RXD input)             */
  S0TIC = 0x80;           /* set transmit interrupt flag         */
  S0RIC = 0x00;           /* delete receive interrupt flag       */
  S0BG  = 0x40;           /* set baudrate to 9600 baud           */
  S0CON = 0x8011;         /* set serial mode                     */


  putchar(' ');         /* send dummy-Byte for compatibility   */

  /* end of init serial0 port:

  /* use GPT1  */
  T3CON = 0x0007;
  T3    = 0x000A;
  /* T3UD=0;



  T3IC  = 0x004B;  /* set up the interrupt level and enable it */
  T3R   = 1;       /* start timer 3 running */


        ADCON = 0x0000;


while (1)
{
if (T3 >= 0x00AA)
{

 /*ADCON = 0x0000;                      /* A/D-Converter: Channel0, Single    */

 ADST = 1;                              /* Conversion start             */

 while(ADBSY);                          /* wait of end of conversion          */

Result[count] = (ADDAT & 0x03FF);

if (count >= 100)
{
somma=0;
for(count = 1; count <= 100; count++)
        {
        somma = somma + Result[count] ;
        }
        media = (somma/100) ;
        printf ("%d\n" , media) ;
        count = 1 ;
        }

        else
        {
        count++;
        }

        }

}
}

When I send the code in execution it arrives to me the following sequence that results to be constant in the time:

578
578
578
578
578
578
578
578
578
578
578
578
578
578
578
578
578
578
578
578
578
578
. .
. .
. .

I just press the key of reset of the card to video it appears me the following endless sequence:

578 -fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff.................

Would someone know, please, to help me?
Thanks