mmm, could be but if the PGM pin is not loaded, on many device (16Fs too), it doesn't work. The PGD,PGC,MCLR wires between your board and your programmer should be short. Here, under 6-8 inches, do the trick. I use a flat cable and i have a GND between all signals.
Make sure the LVP mode is disabled, make sure your supply line is clean, make sure you place few 0.1uF capacitor here and there and better are your chance it works. Usually i place 0.1+10uF tantalum close to the PIC on the Vdd line(s).
In theory, when you program the PIC.. the PIC itself don't need much current, but the hardware attach to could. Without the schematic it's a bit hard to guess. Bear in mind that when you program the PIC, all I/Os should become Hi-z... in this case it could do some strange behaviour.. or not.
Did you place the Diode on MCLR pin too?
Please be patient with people that has an I.C. lower than 150 or 180.
Sorry, i don't know what's happen to me these days.. kind of PMS... sort of 
Last edited by mister_e; - 3rd December 2006 at 19:47.
Steve
It's not a bug, it's a random feature.
There's no problem, only learning opportunities.
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