Order Number: 5007

I tried to upgrade my free version 2.3 to the paid version (com_joomsef2.zip) and got an error message:

Warning: opendir(mydomainpath/cgi-bin/joomla/media/upgrade_4a43d919ddf68/upgrade/) [function.opendir]: failed to open dir: No such file or directory in mydomainpath/cgi-bin/joomla/administrator/components/com_sef/installer/upgrade.php on line 118

Warning: readdir(): supplied argument is not a valid Directory resource in mydomainpath/cgi-bin/joomla/administrator/components/com_sef/installer/upgrade.php on line 119

This package does not contain any upgrade informations.

Please advise.