Neril, I think MCLR has to go low during programming, not sure. I would use a pullup resistor on MCLR just to be safe. Sid -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads