Curl Cookiejar not get the content, how to solve

Curl Cookiejar does not get the content

 
  
Curlimage ();
function Curlimage () {
    $cookieJar =tempnam (' tmp ', cookieimage);
    $ch =curl_init ("http://124.160.104.166/(1jovmraaf1pemj55dkr01ebo)/checkcode.aspx");
    curl_setopt ($ch, Curlopt_cookiejar, $cookieJar);
    curl_setopt ($ch, Curlopt_returntransfer, 1);
    $image =curl_exec ($ch);
    Curl_close ($ch);
    $FP =fopen ("Image.gif", "w+");
    Fwrite ($fp, $image);

}

This code is to obtain a verification code plus a cookie, but every time you look at the Cookieimage file is empty
Why is this? [yabao=] [/yabao] [yabao=] [/yabao]

------to solve the idea----------------------

Print_r (get_headers (' http://124.160.104.166/'));

array 
 (
 [0] = http/1.1 302 Found 
 [1] = = Connection:close 
 [2] => ;    Date:thu, 03:05:03 GMT 
 [3] = server:microsoft-iis/6.0 
 [4] = = X-powered-by:asp.net 
 [5] = = x-aspnet-version:1.1.4322 
 [6] = Location:/(MGGXRGVMYM2TZN45B5WFKH55)/default2.aspx 
 [7] =& Gt    Cache-control:private 
 [8] = content-type:text/html; charset=gb2312 
 [9] = = content-length:158 
     [Ten] = http/1.1-OK 
 [one] = Connection:close 
 [] = Date:thu, the Oct 03:05:04 GMT 
 [+] = server:microsoft-iis/6.0 
 [+] = X-powered-by:asp.net 
 [] = x-aspnet-version:1.1.4    322 
 [+] = Pragma:no-cache 
 [+] = Cache-control:no-cache 
 [] = Pragma:no-cache 
 [+] = Expires:-1 
 [] = content-type:text/html; charset=gb2312 
 [+] = content-length:4091) 
 
 

It is obvious that the path of the form (mggxrgvmym2tzn45b5wfkh55) in the jump is the role of the session.
------to solve the idea----------------------
That's right on the top.

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