sending email problems

Could some one please take a look at this and offer any suggestions as to why i can't 1 send multiple "to" emails and also why i can't send to the addesses in the "CC" part (i can't send to either single or multiple in CC) This has got me baffled as to why i can't... Thanks in advance Peter <? session_start(); if ($REQUEST_METHOD=='POST') { header('Expires: ' . gmdate("D, d M Y H:i:s", time()+1000) . ' GMT'); header('Cache-Control: Private'); } session_register('user'); session_register('pass'); session_register('email'); session_register('company'); session_register('real_name'); $session = session_id(); $userid = '$user'; /* recipients */ $address .= $email ; $date = date("D M d, Y "); // Subject $subject = "abc Calculation Results"; //Body of email $body = "Thank you $real_name ,\n Company whom you are from:\t $company\n Date of enquiry on \t $date\n Your Customer type is:\t $custtype\n Your Reference is: \t $ref\n Your Quote was for: \t $equcost\n Your Rental Monthly Figures are as follows:\n \n 24 Months = $ $m2 \n 36 Months = $ $m3 \n 48 Months = $ $m4 \n Your Quartly Figures are: \n \n 24 Months = $ $q2 \n 36 Months = $ $q3 \n 48 Months = $ $q4 \n \n\n\n\n Thank you again."; //Where the email is from $headers .= "From: abc <webmaster@abc.com.au>\n"; $headers .= "X-Sender: <webmaster@abc.com.au>\n"; $headers .= "X-Mailer: PHP\n"; // mailer $headers .= "X-Priority: 1\n"; // Urgent message! $headers .= "Return-Path: <webmaster@abc.com.au>\n"; // Return path for errors /* If you want to send html mail, uncomment the following line */ //$headers .= "Content-Type: text/html; charset=iso-8859-1\n"; // Mime type $headers .= "cc:peterh@abc.com.au,peterh@abcd.com.au\n"; // CC to //send the email $mailsend = mail("$address", "$subject", "$body.", "$headers \nContent-Type: text/plain; charset=iso-8859-1\nContent-Transfer-Encoding: 8bit" ); print ("$mailsend"); echo "<font face=Helvetica, sans-serif size=3 color=#00499C>Email Sent!</font>"; include "incend.s"; ?>