Chun,
Try this query.But i run it with access.you make change as your requirement.

Query:
CREATE TABLE groups_role
( groups_id text NOT NULL, gr_role text NOT NULL, gr_add bit NOT NULL, gr_edit bit NOT NULL, gr_delete bit NOT NULL, gr_read bit NOT NULL, PRIMARY KEY (groups_id, gr_role), FOREIGN KEY (groups_id) REFERENCES groups(gr_id));

you change text as varchar and create groups table separetly.ok.All the best.