write this code:
T1CON.3 = 0



Code:
          
@__config _INTRC_OSC_NOCLKOUT & _MCLRE_OFF


		CMCON = 7               
        'VRCON = 0               
        'WPU = 0                 'no wake pullup
        'IOCB = 0                'no int. on change
        ANSEL = %00000000      '16tosc gpio0 input analogico
        ADCON0 = 0      'right just , Vref=Vdd , ch.0 , A/D on
	T1CON = %11110101
	T1CON.3 = 0
'OPTION_REG.7 = 0


    TRISIO=%001000
    
LEDT1	var GPIO.1
LEDT2	var GPIO.2




B0	var byte
B1	var byte
B2	var byte
I	var byte
N	var byte
O	var byte
S1	var byte
S2	var byte
S3	var byte


start:
	high GPIO.4
	high GPIO.5
	pause 500
	low GPIO.4
	low GPIO.5
	pause 500
goto start