SWFUpload before the good, now abnormal 500

SWFUpload before the good, now error 500
Because in a file transfer system, so with SWFUpload, with the php100 version. Although you have a big change, but before the test has been successful. Today the whole system did almost, found swfupload problem. After uploading the report 500 error, after testing, as if the session did not pass successfully. But I do not know how to change the permissions of the folder has been fully open, do not know how to go. The test environment is XP, IE6. The following code is attached


Upload page: The change is not big, the page I haven't how to design.
Include (' globle.php ')
?>




<title>File Management System</title>