PostgreSQL problem with Triggers

Hi,
I am trying to implement a trigger in PostgreSQL. My trigger is a C
function which do some very simple things like writing to a file when
the trigger is fired.

The trigger has been created as an "after insert" or "after update" on a
particular table.

However, whenever I perform an insert or update on the table, I get the
following:
server closed the connection unexpectedly
This probably means the server terminated abnormally
before or while processing the request.
The connection to the server was lost. Attempting reset: Failed.

The insert or update also is not reflected in the actual table while my
trigger function (written in C) is executed. I am using postgreSQL
version 7.2.1-5

Any help in this regard would be highly appreciated.

Regards
Arindam

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