Trigger on a column

Hi,

My trigger's running on a table that works perfectly. This trigger calls
a function that inserts or modifies a row of a different table. My
problem is that I need to optimize this trigger, and the only way that
I've found is to fire the trigger when certain table fields are
modified. I do it like this:

CREATE TRIGGER tr_barra_aps AFTER INSERT OR DELETE OR UPDATE OF status
ON am_access_point EXECUTE PROCEDURE f_barra_aps();

but I get this error:
ERROR: syntax error at or near "status" at character 62

The status field is correct. Can anybody help me?

Thanks

--
Josep Sanmarti
Analista de Projectes

OpenWired
Caballero 87 - Bajos
08029 - Barcelona
Tel. 93 495 0990
Fax. 93 419 4591

Openwired
Alejandro Villegas,29
28043 - MADRID - ESPAÑA
Teléfono: 91 300 51 09
Fax: 91 300 28 13
http://www.openwired.com