Change the permissions on catch to 777 (world read, write, and executable)
Change the permissions on all files in the catch dir to 666 (world read/writeable)
PS: You can modify the above depending on your know how of your server. chown to the web user, and or group, and give only that user and/or group permissions to read/write to them files and dir (edit: but don't disallow your ftp user account read/write access!!!). Also some webservers don't need executable permission to allow php, cgi etc.. to view and modify the content of that directory).
PPS: There's a couple directories/files that need write permission to function correctly, for example to allow uploading of avatars <install-dir>/img/avatars needs to be writable by the web user.
echo "deadram"; echo; fortune;