problem with a/d in pic12f675

[samannikzad]

hello, can anybody help me in this code? i just wanna read a voltage from chennel one and turn on and off the led, but i can't do it! please help,i am an iranian,and here,in iran,nobody knows about it.. just tell what the problem is,and i simulated it in proteus,but it doesnt work on proteus

 trisio.2=0  
trisio.0=1 
ansel=%00000001 
adcon0=%10000011 
define osc 8 
define adc_bits 10 
w0 var word 
start: 
adcin 0,w0  
pause 100  
if w0=100 
then 
gpio.2=1 
else  
gpio.2=0 
endif 
goto start 
end