Using Roles and Users

Hi to all,
In a database I create the role READ and I did this:

CREATE ROLE read;
GRANT SELECT ON table1 TO read;
GRANT read TO user1, user2, user3;

then I access to the database like user1 an I wanna do this:

select * from table1

but I have this excetion:

The user does not have the privilege to permorm this operation on this object.
no pertmition for read/select access column Nro_completato

why? What's wrong?
thank's
boss

Check the followings:

1. read is a keyword. Maybe you should use "READ".
2. when u logged on with user1, did you log on with Role: read?