Please open a ticket with support for this issue and attach the Support files and a Network trace when you press the File Server Test button.
Additionally:
- do you have a camera with a different firmware version which is able to access the same fileserver? Please send support-intl@mobotix.com the dump and network trace if available.
- which OS and version is running in the fileserver?
- is there a windows domain? are you using a local user?