access from form on subform/subform

[Guest_imported]

Hello,

I have one form and on that form subform and on subform subform. My problem is : when I with combo box on subform change data in last subform I lose my filter and all records are displayed.
Is it possible to order some event from form on subform/subform because when I try :
form.subform1.subform2 I receive error.

I hope that I wrote question clear, but anyway I will appriciate all help.

Thanks