Problem installing tsearch V2 on a FreeBSD

Hi,

I'm having a problem when I try to run the SQL commands that install the
tsearch2 module,
When I ran the SQL script I've got this message:

SET
BEGIN
NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index
'pg_ts_dict_pkey' for table 'pg_ts_dict'
psql:/usr/ports/databases/postgresql7/work/postgresql-7.3.1/contrib/tsearch2/tsearch.sql:14:
NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index
'pg_ts_dict_pkey' for table 'pg_ts_dict'
CREATE TABLE
CREATE INDEX
ERROR: Load of file /usr/local/pgsql/lib/tsearch.so failed: dlopen
'/usr/local/pgsql/lib/tsearch.so' failed.
(/usr/local/pgsql/lib/tsearch.so: Undefined symbol "stdout")
psql:/usr/ports/databases/postgresql7/work/postgresql-7.3.1/contrib/tsearch2/tsearch.sql:22:
ERROR: Load of file /usr/local/pgsql/lib/tsearch.so failed: dlopen
'/usr/local/pgsql/lib/tsearch.so' failed.
(/usr/local/pgsql/lib/tsearch.so: Undefined symbol "stdout") ...

I'm running a PostgreSQL 7.3.1 on a FreeBSD 5.0
Could anybody help me?

Thanks in advance,

--
Diogo de Oliveira Biazus
diogo(at)ikono(dot)com(dot)br
Ikono Sistemas e Automação
http://www.ikono.com.br