Copy question

[Judith Altamirano <jaltamirano(at)correolux(dot)com(dot)mx>]

Hello every body I'm trying to extract a query as follows:

copy (select * from clientes where id_cliente = 7895) to 
'/home/paso/sel.copy';

But it returns the next error:

ERROR:  error de sintaxis en o cerca de «(» at character 6
LINE 1: copy (select * from clientes where id_cliente = 7895) to '/h...


I was reading the manual and I think the sintaxis is correct, any idea 
wich is the cause of the error?