Forms :: Navigation Form - Call VBA Module

I have three forms - Form1,Form2 and Form3 linked to a navigation form with Navigation buttons. I have separate VBA codes under each Before update event of these forms, Form1,Form2 and Form3 to call a VBA module to track the changes performed by the users(Like an Audit Trail) in specified fields of the forms which will track them to a table.there are control tags in the form properties --> others --> Tag to track the changes in the fields which are defined in the VBA Module.this is the code to call the VBA Module:

Private Sub Form_BeforeUpdate(Cancel As Integer)
If Me.NewRecord Then
Call AuditChanges("UniqueID", "Part No", "NEW")
Else
Call AuditChanges("UniqueID", "Part No", "EDIT")
End If
End Sub

[code]....

The code is working perfect when the forms are run separately.but when they are run from the navigation form by clicking the navigation buttons, the code is not working !!