setcookie issue

[Chmex21]

Here is the code I am working with. I have been trying to get this to work for the last few days, sorry I am new to php. What I am trying to do is have it remember the user that logs in and auto login once the cookie has been set the next time they revisit. The problem that I am having is that it will remember the username and password but won't auto login just fills in the username and password for them. Could someone please help.

<?php

header("Expires: Tue, 01 Jan 1985 07:15:30 GMT");    

header("Cache-Control: no-cache, must-revalidate");  

header("Pragma: no-cache");

$acheck=1;
$member=1;
$config = "includes/config_inc.php";
$emlibs = "includes/mail_lib.php";
          require($config);
          require($emlibs);

               $ip = $REMOTE_ADDR;
               $timestamp = time();
               $affun = trim($affun);
               $affpw = trim($affpw);
               $rememberme = $HTTP_COOKIE_VARS['RememberMe'];
               $affuid = $HTTP_COOKIE_VARS['AFFUID'];
               $affpwd = $HTTP_COOKIE_VARS['AFFPWD'];
               $remember=($remember);
               $forget=($forget);

	if(!$rememberme)
            {
	   $remember_cookie="1";
                              }

	if ($action == "Login")
            {
	   $mcheck = "/templates/affiliate_signup.tpl";
	   $fp=fopen($prog_path.$mcheck,"r");
	   $validate=fread($fp,filesize($prog_path.$mcheck));
fclose($fp);

            if (!stristr($validate, "$spchara"))
            {
               $license=1;
                              }
            if (!stristr($validate, "$spcharb"))
            {
               $license=1;
                              }

	if (!$license)
            {

	   $mysqlaff = mysql_query("select * from $mysqltable_aff where aff_name='$affun' and aff_pass='$affpw'");

        if ($rowaff = mysql_fetch_array($mysqlaff))
        {
	   $dbid = $rowaff["aff_id"];
	   $dbuser = $rowaff["aff_name"];
	   $dbpass = $rowaff["aff_pass"];
	   $lastlogin = $rowaff["this_login"];
			}
                    $attempt=1;

            if ($affun != "" && $affun == "$dbuser" && $affpw == "$dbpass")
            {
               $affid = $HTTP_SESSION_VARS['affid']=$dbid;
               $auser = $HTTP_SESSION_VARS['auser']=$affun;
               $alogin = $HTTP_SESSION_VARS['alogin']=1;
               $update = mysql_query("update $mysqltable_aff set this_login = '$timestamp', last_login = '$lastlogin', remote_ip = '$ip' where aff_id = '$affid'");

	if ($remember==on && $alogin)
	{
@setcookie("RememberMe",1,time()[phone],"/","",0);
@setcookie("AFFUID",$dbuser,time()[phone],"/","",0);
@setcookie("AFFPWD",$dbpass,time()[phone],"/","",0);
				}

	elseif ($forget==on && $alogin)
	{
@setcookie("RememberMe","",time()+1,"/","",0);
@setcookie("AFFUID","",time()+1,"/","",0);
@setcookie("AFFPWD","",time()+1,"/","",0);
				}

	if (!$session_php && $alogin)
	{
	header ("Location:index.php");
			}
	elseif ($session_php && $alogin)
	{ 
	header ("Location:index.php?".sid);
			}}}}

	if ($action == "Logout")
            {
session_unset();
session_destroy();
			$logout=1;
		      }

	if ($license)
	{
             echo "<b>Please email <a href=\"mailto:$admin_email;?subject=Error: #437\">$admin_email</a> quoting error number #437.</b>";
	      }
	else
	{
include "templates/affiliate_login.tpl";
      }
?>

Thank you in advance. I am trying to learn this the best I can.

[Chmex21]

Can anyone help me with this?