First of all i would like to request you to upgrade device to the latest firmware .
You can get it here :
If you are using FW version TRB141X_R_00.01.06.1 or older on your TRB141 gateway, you will need to follow these instructions in order to successfully upgrade your device's FW to a later version.
If you are using the older version as guided you will be updating to the legacy firmware but after upgrading to legacy firmware you still need to update it to the current latest version but if you directly try to upgrade to the current latest version if would show "bad image" . So, please follow the instructions provided.
Have a good day.