I'm using a PIC 16F747 as a BCD decoder w/ LCD display. I've also included a stopwatch function. Everything works as desired except I can't get pins RB4 & RB5 to work as digital inputs. RB6 & RB7 are working as inputs for the timer (start & clear). Can anybody look at this and see what I'm missing? I suspect I need to use ADCON, but I'm having difficullty finding info on the proper usage.

Thanks,

Code:
'initialize device
@ device pic16f747, INTRC_OSC_NOCLKOUT, MCLR_OFF
OSCCON = $60			'internal 4mHz oscillator
define lcd_ereg porte
define lcd_ebit 0

'Initialize ports
TRISA.6 = 1
TRISA.7 = 1
TRISB = $F0
TRISC = $FF			'set all PORTC pins to inputs
TRISD = 0
PORTD = 0

'initialize variables
Index var byte
x var byte
switches var byte
Symbol START_button = PORTB.6
Symbol STOP_button = PORTB.5
Symbol CLEAR_button = PORTB.7
Ticks var byte
Minute var byte
Second var byte
Disp var byte
Delay var byte  

'Initialize LCD
	Pause 1000			'pause 1 sec to let LCD initialize
	LCDOUT $FE,1,"            Firing Panel V.2"
	pause 2000

SETUP:
	LCDOUT $FE,1,"Firing Mode:"
	LCDOUT $FE,150,"Panel Selected:"
	LCDOUT $FE,192,"Wireless Bank:"
	lcdout $FE,214,"Time:"
	Minute = 0
	Second = 0
	Ticks = 0
	Disp = 1
	OPTION_REG = $05
	ON INTERRUPT GOTO ISR 

LOOP:	
    	Index = PORTc & $0F		'Read DIP switch AND mask lsb
  	LOOKUP2 Index,[ 1, 2, 3, 4, 5,06,07,08,09,10,11,12,13,14,15,16],x
    	LCDOUT $FE,166, #x

DISPLAY:
	IF Index = 0 THEN		'Panel 1 selected
		PORTD = $06	'display 1 on LED display
	endif
	IF Index = 1 THEN
		PORTD = $5B	'...
	endif
	IF Index = 2 THEN
		PORTD = $4F
	endif
	IF Index = 3 THEN
		PORTD = $66
	endif
	IF Index = 4 THEN
		PORTD = $6D
	endif
	IF Index = 5 THEN
		PORTD = $7C
	endif
	IF Index = 6 THEN
		PORTD = $07
	endif
	IF Index = 7 THEN
		PORTD = $7F
	endif
	IF Index = 8 THEN
		PORTD = $67
	endif
	IF Index = 9 THEN
		PORTD = $BF
	endif
	IF Index = 10 THEN
		PORTD = $86
	endif
	IF Index = 11 THEN
		PORTD = $BB
	endif
	IF Index = 12 THEN
		PORTD = $CF
	endif
	IF Index = 13 THEN
		PORTD = $E6
	endif
	IF Index = 14 THEN
		PORTD = $ED
	endif
	IF Index = 15 THEN
		PORTD = $FC
	endif

LEDS:
	switches = (PORTC >> 4) & $0F
	if switches > 0 then
		goto LEDSLCD:
	else 
		goto BLANK:
	endif

LEDSLCD:
	IF switches = %00000001 THEN
		lcdout $FE,207," J  "
		portB=1
	endif
	IF switches = %00000010 THEN
		lcdout $FE,207," K  "
		portB=2
	endif
	IF switches = %00000100 THEN
		lcdout $FE,207," L  "
		portb=4
	endif
	IF switches = %00001000 THEN
		lcdout $FE,207," M  "
		portb=8
	endif
	
BLANK:
  	IF PORTA.6 = 1 THEN
		portb = 0
		lcdout $FE,207,"None "
	endif

SAFETY:
	IF PORTA.7 = 1 THEN
		lcdout $FE,141,"ARMED"
	ELSE
		lcdout $FE,141,"SAFE "
	endif

RESET:
	IF portb.4 = 1 THEN
		goto setup:
	endif

TIMER:
	IF START_button = 1 THEN
		TMR0 = 0
		INTCON = $a0
		Disp = 1
	endif

	IF STOP_button = 1 THEN
		INTCON = 0
		Disp = 1
	endif

	IF CLEAR_button = 1 THEN
		INTCON = 0
		Minute = 0
		Second = 0
		Ticks = 0
		Disp = 1
	endif				'Line 171

	IF Disp = 1 THEN
		lcdout $FE,220
		lcdout DEC2 Minute, ":",DEC2 Second
		Disp = 0
	endif
	GOTO Loop:

DISABLE					'Line 180
ISR:
	Ticks = Ticks + 1
	IF Ticks < 61 THEN NoUpdate	
		Ticks = 0
		Second = Second + 1
		IF Second = 60 THEN
			Second = 0
			Minute = Minute + 1
			IF Minute = 60 THEN
				Minute = 0
			endif
		endif

	Disp = 1

NoUpdate:
	INTCON.2 = 0
	Resume
	Enable

	End
	
END