In the hidden elements that are used for the default file, try leaving a space after the recocordset binding for the value.
for example, instead of:
<input name="hiddenField" type="hidden" id="hiddenField" value="<?php echo $row_recordsetName['columnName']; ?>" />
use:
<input name="hiddenField" type="hidden" id="hiddenField" value="<?php echo $row_recordsetName['columnName']; ?> " />