高手帮忙看一下~cookie值写入出错

  $myinfo=mysql_fetch_array($retchk);//得到用户信息
  $set1=hhkj_setcookie("username",$myinfo[username]);

以下为hhkj_setcookie函数
//写cookie值
function hhkj_setcookie($cookiename,$cookievalue,$life=0){
 global $hhkj_cookiedomain,$hhkj_cookiepath,$hhkj_cookievarpre;
 $cookiename=$hhkj_cookievarpre.$cookiename;
return  setcookie($cookiename,$cookievalue,$life,$hhkj_cookiepath,$hhkj_cookiedomain);
}


以下为配置文件中的变量
$hhkj_cookiedomain="";     //cookie作用域
$hhkj_cookiepath="/";     //cookie作用路径
$hhkj_cookievarpre="KYAlH^ae";   //cookie变量前缀

调用后出现以下错误
Warning: Cannot modify header information - headers already sent by (output started at D:\��վ����\����������\HHKJ\Class\Config.php:1) in D:\��վ����\����������\HHKJ\Class\function.php on line 69

e..很强悍。。中文目录+header前输出。。。