Replace "$data_email_sender..." in Sick_Vacation.php with all of the following:
******************************************************************

$data_email_sender =  new FM_FormDataSender(sfm_readfile(dirname(__FILE__)."/templ/Sick_Vacation_email_subj.txt"),sfm_readfile(dirname(__FILE__)."/templ/Sick_Vacation_email_body.txt"),'%EmailReply%');
$data_email_sender->AddToAddr('Matthew Howard <payroll@eastersealswaiver.com>');
$formproc_obj->addModule($data_email_sender);

$autoresp =  new FM_AutoResponseSender(sfm_readfile(dirname(__FILE__)."/templ/Sick_Vacation_resp_subj.txt"),sfm_readfile(dirname(__FILE__)."/templ/Sick_Vacation_resp_body.txt"));
$autoresp->SetToVariables('employee_name','email');
$formproc_obj->addModule($autoresp);