Problem getting button to turn on LED using 12F675

[Jeff]

I have a noob question. i have been playing with this all night. Im using Microcode 3005 and PBP 2.46. Chip is 12F675. I have checked the usual...blinked the LED's using blink program as a test, and tested the button. All i get is: LED 1 stays on. Schematic is similar to the one above 'cept RC osc, different chip of course.

    CMCON = $1F 
    CMCON = %00000111
    
    GPIO = %00000001                 ' Set GPIO 1 high to turn on LED1
    TRISIO = %00000010               ' set GPIO 4-1 to INputs, RA0 OUTput

Main:
    '*** Test the switch state ***
    if GPIO.0 = 0 then led2 'If switch is pressed then jump to LED2 routine 
 
    GPIO.1 = 1            ' Turn LED1 on
    GPIO.2 = 0            ' Turn LED2 off
    goto Main              ' Jump to the top of the main loop

LED2:
    '*** Turn LED2 on ***
    GPIO.2 = 1            ' LED2 on 
    GPIO.1 = 0            ' LED1 off
    goto Main               ' Jump to the top of the main loop

Any hints on how to troubleshoot this? I don't really want it re-written for me because i am trying to learn but i may change my mind later. thanks.