File upload Problems

[spacecop]

yes I'm using v1.9.

Message:

Ein Fehler ist aufgetreten.
Bitte Administrator benachrichtigen

Warning: fopen(/download/20100809.log) [function.fopen]: failed to open stream: No such file or directory in /users/schule/www/1/inc/inc.Utils.php on line 244

Warning: fwrite() expects parameter 1 to be resource, boolean given in /users/schule/www/1/inc/inc.Utils.php on line 245

Warning: fclose() expects parameter 1 to be resource, boolean given in /users/schule/www/1/inc/inc.Utils.php on line 246