when using a checkbox group, the name of the group will end in "[]":
<input type="checkbox" name="CheckboxGroup1[]" value="checkbox" id="CheckboxGroup1_0" />
In server validations, when you select one of the checkboxes to apply the Required validation to, the code in the value box will look like this:
php:
<?php echo((isset($_POST["CheckboxGroup1[]"]))?$_POST["CheckboxGroup1[]"]:"") ?>
you will need to manually remove the "[]" from that code:
php:
<?php echo((isset($_POST["CheckboxGroup1"]))?$_POST["CheckboxGroup1"]:"") ?>
