[SOLVED] Problem with ADC @ PIC16F877A

sbit Data at RA1_bit;
sbit DataDir at TRISA1_bit;
char message2[] = "H:  ";
char message3[] = "H:  ";
unsigned short TOUT = 0, CheckSum, i;
unsigned int value;
unsigned char ch;
unsigned short row, position;
unsigned int ax,bx,cx,dx;
unsigned int ax1,bx1,cx1,dx1;
unsigned long button_value;
unsigned long button_value2;
unsigned long Recent_Temp_Value;
unsigned int humidity;
long tlong;
float temp;
float average;
unsigned int j,adc_rd0;
unsigned int sample[3];
unsigned int T_Byte1, T_Byte2, RH_Byte1, RH_Byte2;

void StartSignal()
{
  DataDir = 0;     // Data port is output
  Data    = 0;
  Delay_ms(25);
  Data    = 1;
  Delay_us(30);
  DataDir = 1;     // Data port is input
}

unsigned short CheckResponse()
{
  TOUT = 0;
  TMR2 = 0;
  T2CON.TMR2ON = 1;      // start timer
  while(!Data && !TOUT);
  if (TOUT) return 0;
  else 
  {
   TMR2 = 0;
   while(Data && !TOUT);
   if (TOUT) return 0;
   else 
   {
    T2CON.TMR2ON = 0;
    return 1;
   }
  }
}

unsigned short ReadByte()
{
  unsigned short num = 0, t;
  DataDir = 1;
  for (i=0; i<8; i++)
  {
    while(!Data);
    Delay_us(40);
    if(Data) num |= 1<<(7-i);
    while(Data);
  }
  return num;
}


void interrupt()
{
  if(PIR1.TMR2IF)
  {
   TOUT = 1;
   T2CON.TMR2ON = 0; // stop timer
   PIR1.TMR2IF  = 0; // Clear TMR0 interrupt flag
  }
}


  // port initialization
  TRISB = 0b00000000;
  PORTB = 0;
  TRISA = 0b00100011;
  TRISC = 0x10; // RC4 in all out
  PORTC = 0x00;
  TRISD = 0x0C; // D2 & D3 inputs all out
  PORTD = 0x00;
  CMCON = 7;// comparator off
  ADCON1 = 0b00001110;// AN selletion
  INTCON.GIE = 1;    //Enable global interrupt
  INTCON.PEIE = 1;   //Enable peripheral interrupt
  // Configure Timer2 module
  PIE1.TMR2IE = 1;  // Enable Timer2 interrupt
  T2CON = 0;        // Prescaler 1:1, and Timer2 is off initially
  PIR1.TMR2IF =0;   // Clear TMR INT Flag bit
  TMR2 = 0;
  Lcd_Init();
  Lcd_Cmd(_Lcd_Clear);
  Lcd_Cmd(_LCD_CURSOR_OFF);


  while(1)
  {
    DHT11_Data();
    Delay_ms(500);  
    Thermal_Data();
    Delay_ms(500);
  }// while(1)

/*******************************************************************************/
/***************************** DHT11_Data **************************************/
/*******************************************************************************/
 void DHT11_Data(void)
 {
    unsigned short check;
    //PIE1.TMR2IE = 1;  // Enable Timer2 interrupt
    //ADCON1 = 0b10000111; // all digital selected
    StartSignal();
    check = CheckResponse();
    if (!check)
    {
       Lcd_Cmd(_Lcd_Clear);
       Lcd_Out(1, 1, "No response");
       Lcd_Out(2, 1, "from the sensor");
    }
    else
    {
     RH_Byte1 = ReadByte();
     RH_Byte2 = ReadByte();
     T_Byte1 = ReadByte();
     T_Byte2 = ReadByte();
     CheckSum = ReadByte();
     // Check for error in Data reception
     if (CheckSum == ((RH_Byte1 + RH_Byte2 + T_Byte1 + T_Byte2) & 0xFF))
     {
        value  = RH_Byte1;
        message2[0] = RH_Byte1/10 + 48;
        message2[1] = RH_Byte1%10 + 48;
        Lcd_Out(1,14, message2);
        Lcd_Out(1,16,"%");
     }
      else
      {
         Lcd_Cmd(_Lcd_Clear);
         Lcd_Out(1, 1, "Checksum Error!");
         Lcd_Out(2, 1, "Trying Again...");
      }
    }
    //ADCON1 = 0x00;// all analog selected
 }

/*******************************************************************************/
/***************************** Thermal_Data    *********************************/
/*******************************************************************************/
 void Thermal_Data(void)
 {

   Delay_ms(50);
   //ADCON1 = 0x00;// all analog selected
   ADCON0=0b11000001;// Channel 1 selected with internal clock speed
    for(j=0; j<3; j++)
    {
     adc_rd0 = ADC_Read(0);
     sample[j] = adc_rd0;
     Delay_ms(200);
    }
    average = 0;
    for(j=0;j<3;j++)
    {
     average += sample[j];
    }
    average /= 3;
    average = ((1023 /average )-1);
    average = 10000/average; // get the resitror value
    temp = average/10000; // R/Ro
    temp = log(temp); // temp = log(R/Ro)
    temp /= 3950; // 1/B
    temp += 1.0/(25.00 + 273.15);
    temp = 1.00/temp;
    temp = ((temp-273.15)*1.8)+32.00; // converting K to F.
    tlong = temp*100;
    Recent_Temp_Value = temp*100;
    row = 1;
    position = 3;
    Lcd_Out(1,1,"T:");
    Display_Temp();
    
    ax = EEPROM_Read(0);
    bx = EEPROM_Read(1);
    cx = EEPROM_Read(2);
    dx = EEPROM_Read(3);

    button_value = dx*1000 + cx*100 + bx*10 + ax;

    row = 2;
    position = 3;
    tlong = button_value;
    Display_Temp();
    Lcd_Out(2,1,"S:");
    //ADCON1 = 0b10000111; // all digital selected
 }