Subform link not working

[Grace]

Hello, I have a button contained on a form [FormHelpDesk]
that when pressed opens another form [FormAppId].
[FormAppId] is a form that contains two subforms. These
subforms are linked to the masterfield of [PIN]. When I
open [FormAppId] without using the button all the links
work great. However, when I open the form [FormAppId]
using the button which is contained on [FormHelpDesk],
only the first subform's link works. The second subform
shows blank records.

Any thoughts?

Thanks!