Thats the first time you post this error. The error you posted was:
Connecting to www.ispconfig.org|188.8.131.52|:80
HTTP request sent, awaiting response... 404 Not Found
2011-11-02 09:18:32 ERROR 404: Not Found.
Which means that you were not able to download the file with wget and not that you successfully downloaded, unpacked and executed it....
Slowly I get the feeling that you want to screw me over here...
You repaired the config.inc.php file as I suggested? If yes, then run:
[code]cp -pf /usr/local/ispconfig/interface/lib/config.inc.php /usr/local/ispconfig/server/lib/config.inc.php[code]
and try to run the update.php script again.