I have a very strange behavior on a form and I wonder if someone can point me on any clue here.

I have an order entry form. My main table in the dataenvironment is the order and I have a relation one-to-one with the supplier.
When I start the form, I move (skip, go bottom, etc...), the supplier's information on the screen shows without problems.
When I add a new order, I select a supplier, save the order, the relation is still there and the information is correctly registered in the form. However, after that, as soon I move, I loose the relation (the pointer is always at the EOF of the supplier.

? Is there any known reason why a relation can be broken this way?
? Is there a way to "reactivate" the relation?

1000 thanks
eric.