Hi Moz,

Are you using the bootloader program PROGPIC2.exe that comes with the K8048?

If so, did you include the...

   DEFINE LOADER_USED 1

statement in your program. If it's missing, it can cause some very strange problems.

Do you have a 16F627 or a 16F627A ?? Make sure that the selected device in the programmer matches the chip you are using.

And, make sure there aren't any chips in the other sockets (8pin, 14pin or 28pin)

HTH,
   Darrel