If you're using ColdFusion 6.1, the "CHECKED" attribute is ignored when using
PRESERVEDATA.
To accomplish this, set the variable FORM.CheckBoxGroupName to
"FirstCheckBoxValueToBeChecked,SecondCheckBoxValue ToBeChecked,etc." for each
CFINPUT NAME group you want checkboxes checked in.
Let me know if you want further explanation, I know this is an old one (found
the post when searching for a fix for a checkbox/preservedata bug inserted in
CF 7.)