Mouse Scroll with 1 Main Form and 2 subforms MS ACCESS

I have a MS ACCESS 2007 form with 2 subforms. I have a few fields from the main form as text, a few on the second form as text, and a lot on the third form as a variety of things.

My problem with these subforms, when I am entering data in the main form, my mouse scroll works just fine to scroll to the bottom of the form. When I am in subform 1 or 2, my mouse scroll stops working to scroll down to the bottom of the main form. I tried looking up disabling mouse scrolling but that's already preset for a single form view in MS Access 2007. I just want the mouse scroll to work only for the general form even if you are doing data entry into subform 1 and 2.