Serin serout problem

[lerameur]

even this do not work...
compiles and everything, but no action

@ DEVICE PIC16F876A , HS_OSC , WDT_OFF , PWRT_ON , BOD_ON , LVP_OFF , PROTECT_OFF
'HS 20mhz, watchdog off, powerup timer on, mclr external, brown out detect on, low volt program off , code protect off
DEFINE OSC 20
INCLUDE "modedefs.bas"
TRISC =0
loop:

portc.3=1 'Blink led
pause 300
portC.3=0
pause 300

goto loop

end