I have a headache.....INPUT anyone?

Could someone please enlighten me as to why this doesn't work on a PIC16F688?

DEFINE OSC 4
led1 var porta.2
led2 var portc.2


onoff var word
sig var word
p0 var word
trisa.2 = 0
trisc.2 = 0
trisc.3 = 1
trisa.0 = 1
ADCON0 = 1


main:
onoff = portc.3
If onoff = 1 then <----Hangup is here
high led1
ADCIN 0,p0
sig = p0*4
pause(sig)
high led2
pause(sig)
low led2
else
low led1
low led2
endif
goto main

If I write it unconditional, it works beautifully. As soon as I try to tell it "only if C.3 is high" nothin...
If I tell it "only if C.3 = 0"... works fine.
I've also tried
if (PORTC.3 = 1) THEN

and

if PORTC.3 = 1 THEN

and

onoff = PORTC.3
if onoff = 1 then

and
if (onoff = 1) then

According to everything I have found online, any of these should work. I'm apparently missing something.....

Hi,
PortC.3 is also AN7 and the pins comes up in analog mode by default, to use the pin as a digital onput you need to enable the digital circuitry.
See the ANSEL register and also the CMCON register even though it's not related to PortC.7 specifically.

/Henrik.

Thanks so much! added ANSEL = 0 and works like a charm!