Delphi7, Zeos DB et Postgres

Question

I'm working on an application in Delphi using PostgreSQL as a database. I'm actually getting a problem with the connection in design-time: when I try to run a simple query like :

select * from article;

I get a message which says that the table article does not exist whereas it does exist, besides when I execute the program, the query runs correctly.

I note that the TZConnection connects well to the Postgres database at design time.

Any ideas?