I'm not quite sure how to describe the problem, but I guess it has something to do with the settings in the ISPConfig-Backend concerning PHP and open_basedir. For instance, I get the following messages when performing filesystem-operations: Code: //creating a directory mkdir(): Permission denied //writing a file file_put_contents(..filename..): failed to open stream: Permission denied //reading a directory opendir(...path...): failed to open dir: Permission denied //using curl curl_setopt(): CURLOPT_FOLLOWLOCATION cannot be activated when safe_mode is enabled or an open_basedir is set In ISPConfig, PHP is set to Fast-CGI and open_basedir contains the following entries: My applipaction is running in /var/www/clients/client1/web5/web/my_application/ So, how can I configure ISPConfig to let PHP read/write to the filesystem? Is it possible (or wise) do disable open_basedir or safe_mode? Or is this not the problem? Thanks in advance!