Screen Memory Leak

[Wiznane]

I have a form that consists of a main group of text boxes, with two subforms below it. The form is larger than a normal screen and uses a scroll bar on the side to move to the lower parts. The problem I am having is that after entering for awhile, sometimes the screen screws up a bit when scrolling around. Bits and pieces of controls are in the background. Normally, this wouldnt't be so bad, as I have seen Windows programs do this often. But then the error "not enough screen memory comes up" and mostly everything goes gray. Closing Access and restarting results in a "not enough memory to create window" error. Nothing short a reboot. Any suggestions on how to solve this little memory leak?

Thanks in advance...