insert error

Hi,

I am getting the following error while executing insert command after I 
have started the erserver. I did not get this error when erserver was 
not started. I installed the latest versions of postgresql (7.3.4) and 
erserver (1.2). Please advise. Thanks

Regards,
Suresh Basandra

pwtestdb=# insert into person (empid) values (1);
FATAL:  Pre-7.3 object file made an elog() call.  Recompile.
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: Succeeded.