2007 - ECUFlash and Tactrix OpenPort 2.0 - Read successful, says Rom Unknown?

Hello folks.

I'm hoping there might be something simple I am missing here.

I have read the ECU with ECUFLASH successfully, but it comes up and says Rom Unknown.

I've tried various definition files I've found online, but nothing changes. I've reinstalled ECUFlash a few times as well.

Any suggestions?

Thank you for your time.