ND-3500a firmware update from 2.98?

I have a nec nd-3500a and my firmware is 2.98. I tried to update my frimware to 2.1a but it tells me Target NEC ND-3500A is not found correctly. Am i doing something wrong or is this because i dont need to update my firmware? I need help i never updated firmware before. Thanks. :bow:

Not sure if you are familiar with firmware upgrades or not but have a look here:
These are the firmwares available:
I am using the 2.TG FW and after many, many burns still getting results like this:
:slight_smile: :slight_smile: :slight_smile: