polating (insert into...) a table with determined record from another table.

Dear my friends...

I created a table (named : sven1). I want to populate
this table with the record from another table (named :
appoinment).
but I don't know how to formulate the sql query.

I tried this one:
insert into sven1 (custid, noapp) values ((select
custid from appointment where done='N' and
salesid='6'), (select noapp from appointment where
done='N' and salesid='6'));

But I got this error in my psql console:
kv=# insert into sven1 (custid, noapp) values ((select
custid from appointment where done='N' and
salesid='6'), (select noapp from appointment where
done='N' and salesid='6'));
ERROR: more than one row returned by a subquery used
as an expression
kv=#

Anybody would be so nice to help me solving this
problem?

Thank you very much in advance.

__________________________________
Do you Yahoo!?
Yahoo! Mail is new and improved - Check it out!
http://promotions.yahoo.com/new_mail