Apparently the program is incompatible with this WebDAV server.
I can fix it if we look at the Internet Protocol Log files named FTPLOG*.TXT. You can activate Internet Protocol logging on the Program Settings dialog, on the Logs tab sheet where you turn on the normal logs too. Then the log files will be in the TEMP folder which you get to by entering %TEMP% in the address bar of Windows Explorer. Run the job once to produce the error, then close the program and you will see the logs. They should not contain any private information other than the file names.
Please send them to
info@superflexible.com rather than posting them here because they are very detailed.