As crazy as it seems, you want to disable the ADC on these specific pin, but enable the comparator. it also seems you miss a bit in your CM1CON0 register?

Give this a shot
Code:
        C1OUT VAR CM1CON0.6
 
        PORTA = 0
        PORTB = 0
        PORTC = 0
 
        TRISA = %00000011 'PORTA<1:0> = Input
        TRISC = 0 
        TRISB = 0 
 
        ANSEL = 0 ' Disable 
        ANSELH = 0 ' All ADCs
 
        CM1CON0 = %10001000
                ' -1-------- C1ON: Enable comparator 1 
                ' --x------- C1OUT: Read only
                ' ---0------ C1OE: C1OUT set to internal 
                ' ----0----- C1POL: C1OUT Logic not inverted
                ' -----1---- C1SP: Operate in normal power mode
                ' ------0--- C1R: C1Vin+ Connected to C1IN+ (A.0)
                ' -------00- C1CH<1:0>: C1Vin- connected to C12IN0- (A.1)
MainLoop:
        LATB.6 = C1OUT
        PAUSE 200
        GOTO MainLoop
END