Hi, maybe you are using the wrong configurator for the firmware version that you are currently using for your FMB120.
We would like to analyze your issue.
Please contact your sales manager. If you don't have any contacts with our Sale managers, please contact with them on our official website https://teltonika-gps.com/ and click on the "Contact Us" button. When you will click, please fill the form and submit it. Note: as a topic, please choose "Vehicle telematics". Or you can send an e-mail with description of your situation to info@teltonika.lt When contacting Us, please provide: IMEI/Logs/Configuration file/International GSM number/Firmware version/ect, please follow these recommendations: https://wiki.teltonika-gps.com/view/Recommendations_for_filling_a_query_description
Regards
Maynard