Okay I have had a go & failed What am I doing wrong?

Code:
'PIC12f683

#CONFIG 
   __config _INTRC_OSC_NOCLKOUT & _WDT_OFF & _MCLRE_OFF & _CP_OFF
#ENDCONFIG

DEFINE OSC 4 '4mhz ocsillator
ANSEL = %00000010 'pin 6 analog
CMCON0 = %00000100 'comparator mode
VRCON = %00001000 'voltage reference
TRISIO = %00000010 'pin 6 input

POTEN VAR CMCON0.1 'pot pin 6
LED VAR GPIO.2 'led pin 5

PAUSE 20

main:
IF CMCON0.1 = 1 THEN
HIGH LED
ELSE
LOW LED
ENDIF
GOTO main