???blink test works in proteus & dev board, but not in projectboard

[cigua]

hi to all, whats going on with this is that simple code blink.bas works fine in proteus, also in my matrix m development board, but i remove the chip do a basic setup of it in a protoboard and it doesnt work, using 4mhz crystal, 22pf caps, also tested w/out caps, 5v and gnd to chip, led with resistor in ouput pin, why isnt working
am using 16f84-04/p, is it mandatory to ground or 5v the unused pins?
thanks for any help

[jeanninemtv]

attach pullup resistor to mclr pin.  maybe you forgot it
check the values of caps attached to crystals.   if you are working on protoboard they are not mandatory.  one time i used 100n     and pic dont work....  little error .... but check out your circuit. or check fuses while programming

[cigua]

hi jeanninemtv, mclr has pullup, fuses are xt crystal 4mhz, wdt off, pwrup on, tried with caps and w/out, what else could it be?

[mculove]

Did you try to disable Watchdog timer while programming your chip?