Input problems with 12F629?

[Acetronics2]

This one should work ... ( ISIS tells so ... )

'****************************************************************
'*  Name    : SERVOTEST0                                        *
'*  Author  : [select VIEW...EDITOR OPTIONS]                    *
'*  Notice  : Copyright (c) 2013 [select VIEW...EDITOR OPTIONS] *
'*          : All Rights Reserved                               *
'*  Date    : 10/02/2013                                        *
'*  Version : 1.0                                               *
'*  Notes   : 12F629 @4 Mhz internal                            *
'*          :                                                   *
'****************************************************************

#CONFIG
   __config _INTRC_OSC_NOCLKOUT & _WDT_ON & _PWRTE_ON & _CP_OFF & _MCLRE_OFF
#ENDCONFIG

Servo   var GPIO.0
Right   var GPIO.1
Left    var GPIO.2

Define OSCCAL_1K 1 
CMCON   =7 ' disable analog comparator
' ansel=0  NO ANSEL with the '629 !!!...
TRISIO  = %11111110 ' set GPIO as output
                 ' others as input
i VAR BYTE
clear 

low Servo
pause 100

' commented outloop:
main:

while 1
    IF Right THEN
        pulsout Servo, 147
    ELSEIF Left THEN
        PULSOUT Servo, 152
    ELSE
        PULSOUT Servo, 150  ' Center/stop ( ? ) if no button pushed ...   
    ENDIF
    
    Pause 19
    
WEND
       
end

Alain