Concerning the loss of ie sessions, please help me.

About session loss of ie .. please help me with the code: session_start (); header ("Content-Type: & nbsp; text/html; charset = utf-8"); setcookie & nbsp; ('username ', & About session loss of ie .. please help me
The code is simple.

session_start();
header("Content-Type: text/html;charset=utf-8");
setcookie ('username', "aa",time()+3600*24*365);
$_SESSION['username'] = "a"; 
echo "PHPSESSID：".$_COOKIE['PHPSESSID'];

In firefox, the PHPSESSID can be normally displayed in chrome, but it cannot be written to $ _ COOKIE ['phpsessid '] when a session is written to ie, resulting in session content not being retrieved later. Answer
Environment IE6 shared: More