Binding problem with form controls in IE

My cfm page binds an external cfm page to the checkbox and radio button controls on my form. This works beautifully in Firefox, but not so well in IE. In IE I have to select a control and click somewhere else on the page before the bind happens.

The page is availalbe for review here:
http://bl-geoy-rutile/geology/geologicNames/list.cfm

I'm passing the several URL parameters to the external cfm page using the bind statement.

Here's the bind statement:
<cfdiv bind="url:get_list.cfm?Region0={Region0.checked}&Region1={Region1.checked}&Region2={Region2.checked}&Region3={Region3.checked}&Region4={Region4.checked}&Region5={Region5.checked}&Stratigraphic={Stratigraphic.checked}&Alphabetic={Alphabetic.checked}&chkPenn={chkPenn.checked}&chkMiss={chkMiss.checked}&chkDev={chkDev.checked}&chkSil={chkSil.checked}&chkOrd={chkOrd.checked}&chkPrecam={chkPrecam.checked}&chkCam={chkCam.checked}">

You may download the two cfm files in question using this link:
https://www.slashtmp.iu.edu/public/download.php?FILE=neaton/94fHJFyN

Is there something I need implement so that IE "notices" when the form controls change?

Thanks,
Nathan Eaton
Indiana Geological Survey