N-N question

Hello everybody,

I’d liked to use N-N feature to update a cross table but I can’t figure out how could I do…

I have 3 tables :

tab1 - id1, description

tab2 - id2,id3,id4

tab3 - id1,id2,id3,id4

With N-N feature, I need to insert a new record on tab3(id1-id2-id3-id4) giving to the user the possibility to choose N tab2(id2-id3-id4) keys, with a multiple select control, to assign for every tab1(id1)

N-N feature doesn’t seems to support multiple keys…
Actually I’m only able to insert a new record on tab3(id1-id2-id3-id4) assigning N tab1(id1) choosing a tab2(id2-id3-id4) key, this is because tab1(id1) has only one field as key !

Ciao
Raimondo