is the odbc driver or me inconsistent??

rhlinux5.2/postgres 6.4.2, odbc 6.40.5xxxxx, win98/access97

many tables created and working fine -- able to modify, insert, etc. either
directly into the table or through queries.

but now. . .

create table testing (
f1 int4 primary key,
f2 char(6)
);

i link to the table in access97, open it by double-clicking directly on the
link, and it comes up as a table that is not updateable (which also means
that i cannot insert a record either). The other tables linked still work
fine. any ideas? i am trying to solve the problem of not being able to
insert or update a table that has two fields as a primary key. but it
looks like something has gone wrong -- i can't even insert or update this
simple table!

jt