Thermometer with MAX6675 and thermocouple

[SKOLS1]

Hi to all,
I made a thermometer with PIC16F876A @ 4 MHz ,with MAX6675 sensor for thermocouple of K-type.I used a code from this forum to "read" the sensor with SPI comunication.But I have problems with the temperature.The temperature is so jumping,isn't showing the write temperature,but in home ambient room temperature(22 degrees celzius).The result is from 0-5 degrees.It shows a wrong temperature,I said,the difference is +5 degrees.
Here are some picures of my thermometer with thermostat that I made:
http://pic.mk/images/svbKM.jpg
http://pic.mk/images/Xq53R.jpg
http://pic.mk/images/v1wsX.jpg

[SKOLS1]

'Alias pins - MAX6675 temp sensor MXSCLK      var     PORTD.0   'MAX6675 Clock MXCS        var     PORTD.2   'MAX6675 Chip Select MXSO        Var     PORTD.3   'MAX6675 Serial Data  '--Variables----------------------- kTemp       var     word    'raw data from MAX6675 tempC       var     word    'temperature in degrees C tempF       var     word    'temp C converted to degrees F   '-----------Read and display temperature from MAX6675----------- main:     LOW MXCS                            'chip select low     shiftin MXSO, MXSCLK, 0, [kTemp\16] 'shift in the data     HIGH MXCS                           'chip select high     tempC = kTemp >> 5                  'side shift to ditch the stuff to the right of the decimal point and just show whole degrees)       tempF = ((tempC * 18)/10) + 32      'convert C to F             lcdout $fe,1,dec tempC," degrees C  ",$fe,$c0,dec tempF," degrees F  "   'display the data on LCD     pause 500    goto main    end

I used this code for MAX6675 from Byte_Butcher.