>I am able to bootload into a board with PIC16F877 DIP package
>without any problem.

Fine.

>In another board with the same design but all package being
>surface mount and 16F877 in PLCC package i am not able to
>bootload. what could be the reason and the problem.

1. Are you sure it is an F877, and not an F877A - they have different
programming algorithms.

2. There are other subtle differences in the chip internals that may require
modifications to the boot loader. Microchip do have a document that gives
the differences between the two chips.

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