Record Source For One Form Multiple Tables

I am making a master form for three tables which ultimately form a hierarchy. I am getting all the fields from each table onto one form. By default the record source would be made up of an INNER JOIN such as below

SELECT PERSON.first_name, PERSON.country, PERSON.last_name, PERSON.street, PERSON.area, PERSON.city, PERSON.telephone, CONTRIBUTOR.registration_date, CONTRIBUTOR.fav_category, MUJAHED.profession FROM (PERSON INNER JOIN CONTRIBUTOR ON PERSON.id=CONTRIBUTOR.id) INNER JOIN MUJAHED ON CONTRIBUTOR.id=MUJAHED.id;

I'm trying to change the record source to match using the where clause instead. However the following allows me to view but not add a new record

SELECT PERSON.first_name, PERSON.country, PERSON.last_name, PERSON.street, PERSON.area, PERSON.city, PERSON.telephone, CONTRIBUTOR.registration_date, CONTRIBUTOR.fav_category, MUJAHED.profession
FROM PERSON, CONTRIBUTOR, MUJAHED
WHERE (PERSON.id = CONTRIBUTOR.id) AND (CONTRIBUTOR.id = MUJAHED.id);

A tip or guideline on how I can correct this will be appreciated.

Regards