IBO 4.5B D7 XP sp2

I have a master/detail relationship setup between two tables and
need to insert new records into the detail table. When I am using
the query form from the IBO_Query (when you double click on the
component) I enter a master parameter, open the table, get the
expected records, but the "+" key from the menu is never enabled so
I can't insert. I can edit ok from here.

The same happens when I run my program, however I get a Foreign Key
Violation when I try to post. I have examined the values in the
BeforePost event and they all look ok.

If I remove the master/detail relationship I can post new records.

Any ideas?

below is the detailed info.

Rick

DETAIL TABLE:

SELECT IDNUM
, MIXNUM
, B1.NAME MIX_NAME
, SEEDNUM
, B2.NAME SEED_NAME
, MIX_PERCENT
, COLOR
FROM SEED_MIXTURES S
JOIN BULK_SEED B1 ON B1.ITEMNUM = S.MIXNUM
JOIN BULK_SEED B2 ON B2.ITEMNUM = S.SEEDNUM

Master source: BULK_SEED
Master links: SEED_MIXTURES.MIXNUM=ITEMNUM

Insert SQL:

INSERT INTO SEED_MIXTURES(
IDNUM, /*PK*/
MIXNUM,
SEEDNUM,
MIX_PERCENT,
COLOR)
VALUES (
:IDNUM,
:MIXNUM,
:SEEDNUM,
:MIX_PERCENT,
:COLOR)

Table DDL

RECREATE TABLE SEED_MIXTURES
(
IDNUM INTEGER NOT NULL,
MIXNUM INTEGER NOT NULL,
SEEDNUM INTEGER NOT NULL,
MIX_PERCENT SMALLINT DEFAULT 0 NOT NULL,
COLOR VARCHAR( 25),
CONSTRAINT PK_SEED_MIXTURES PRIMARY KEY (IDNUM)
);