Opening a form with cursor in a control filed

[quinto via AccessMonster.com]

I have a form with a subform as reference. I only do data entry in 3 fields.
I have set the tab control for field 1, 2 and 3, but when I click on add new
record the cursor goes to the subform and and cannot tab out to the first
field of the main form. I would like to set this up that on got focus the
cursor is on the selected field and then tabs or move on enter to the next
selected field in the tab order.
The tab order in the main for is resetting to zero.

Thanks

Quinto