Cookie error after 4.2.3 upgrade

I get the following error when using a previously working cookie function: expects parameter 3 to be long Code is below... I just don't see the difference then the way the doc uses: time() - 3600 -vs- the way I did it below... Thanks ! function f_put_cookie($user_name,$user_email,$account_type,$company_name) {

       global $HTTP_COOKIE_VARS;
       global $s_c_url;

       $l_url = ".".$s_c_url;
       $l_cookie_expireN = date('r', time() - 4000 );
       $l_cookie_expire = date('r', time() + 400 );
       $l_cookie_expire2 = date('r', time() + 400*30*12 );

               setcookie("c_user_email","",$l_cookie_expireN);
               setcookie("c_user_email",$user_email,$l_cookie_expire2,'/',$l_url,0);
               setcookie("c_user_name",$user_name,$l_cookie_expire,'/',$l_url,0);
               setcookie("c_account_type",$account_type,$l_cookie_expire,'/',$l_url,0);
               setcookie("c_company_name",$company_name,$l_cookie_expire,'/',$l_url,0);
               setcookie("c_uas_time", "GREEN",$l_cookie_expire,'/',$l_url,0);

}