But I get this error message:
"Warning: Page has Expired
"The page you requested was created using information you submitted in a form. This page is no longer available. As a security precaution, Internet Explorer does not automatically resubmit your information for you.
"To resubmit your information and view this Web page, click the Refresh button."
Hitting F5 refreshes the page, but the check boxes are still blank.