I had a similar problem with my home made programmer.
The cause: the reset came up too slow.
I guess that your cable is too long.
Wouter.

----------
> From: fcembrola <fcembrola@BTINTERNET.COM>
> To: PICLIST@MITVMA.MIT.EDU
> Subject: I'm stuck with ISP problem
> Date: Sunday, May 24, 1998 18:50
>
> Hi folks!
>
> I'm sorry for bringing this subject up again,
> but I need some help in trying to
> understand what's going on here.
>
> I constructed a cable which connects my
> PICSTART16B, via a home-made socket,
> to my project, in order to do in-circuit
> programming.
>
> When I try to program the PIC (16C84), I find
> that the first location is being programmed
> with the second byte of the program, the
> second location with the third byte... and so
> on.
>
> Even more strangely it verifies ok.
>
> This is consistent. Therefore I have to
> assume that the cable is correct.
>
> I need a clue why this is happening.
> Help!!!!!!
>
>
> Francesco Cembrola