access 2000 - problem with making a form a pop-up

Hi,

My problem is simply this. I am using Access 2000. I have a main form that has many buttons on it that when clicked open another form. My problem is when I change the forms that are being opened to "pop-ups" (changing properties from "no" to "yes") the code stops working.

Meaning the form that is being opened allows users to track work hours and the form that the button that opens that form is for tracking overall hours worked. So, when the form opens and it is not set as a pop-up it calculates fine and when closed automatically updates the main form. Once I change it to a pop-up the and update some hours for a volunteer and close to save my main form does not automatically update.

Kinda confusing, but hopefully someone has experienced this before and has a solution. Thanks in advance.

Regards,

Freez