trying to reduce current consumption on a 12HV615

[Max Power]

I have this project at work (can't really post the complete code)where I'm using the ECCP on a 12HV615 to output a PWM signal that changes the duty cycle with a button press. I had the chip blazing at 8MHz with no regard to current consumption. now I'm trying to cut the current. I changed to 4MHz, and I added a nap command while I wait for the button press. The nap command shuts down the PWM, so I can only nap when the duty cycle is zero. the thing is, it had no effect on the current consumption. Can anyone enlighten me?

here is (sort of )the code ...thanks PicmultiCalc!

 @    __CONFIG _CP_ON & _WDT_ON & _BOR_OFF & _MCLRE_OFF & _PWRTE_ON & _INTRC_OSC_NOCLKOUT & _IOSCFS_4MHZ 
CLEARWDT
DEFINE OSC 4
ANSEL....
GPIO....
TRISIO....

array of pwm values..
set CPP duty cycle to zero..

'SETUP and turn on PWM module for 20KHz, using a 4MHz clock
CCP1CON =   001100       ' CCP1, PWM mode, single output
PR2     =   49              ' 49 = 20KHz pwm frequency @4MHz and 1:1 prescaler
T2CON   =   000100       ' 1:1 postscaler, TMR2 on, prescaler is 1




Main:


WHILE SWITCH_INPUT = 1         ; Wait here for the dim input to go low
    IF PWMvalue[state] = 0 THEN    ;  if the light is off, then
        TRISIO  = 111111        ; set pins to high impedance
        CCP1CON    = 000000    ; turn PWM off (resets ECCP module)
        T2CON   = 000000        ; TMR2 off
        NAP 0                 ; go into low power mode for about 18 milliseconds
        @ NOP                
    ELSE
        TRISIO  = 111000        ;turn outputs back on
        CCP1CON    = 001100     ; CCP1 is on, PWM mode, single output
        T2CON   = 000100     ; 1:1 postscaler, TMR2 on, prescaler is 1
    ENDIF


WEND

blah blah blah
debounce
increment the state variable
pull the new pwm value out of the array 
update the pwm
wait for the switch to be released
loop back to main