Hi,
When I program the chip, I set 8MHz internal clock and Disable RESET pin (as PORT3.6) using the function DISABLE_RESET. The program is running well, but when I want to reprogram again, I can't enable PORT3.6 as RESET again. Help me out of this problem !
Do you use rechargeable batteries or a power supply? I guess that you have problems with bad batteries. Try some other batteries or charge and discharge your batteries a few times.
Regards, Stephan