That's the only box the DM800HDseV2 that had a big "change" in the software.
With JapharFlasher v1.1, flash a v6 image, and you will get your box working as good and better than before.
If you need to backup your configurations in the box, flash the SSL89J-v6 first (That will get your box compatible with the new Sim OS v6, then backup the files you need and finally Flash a v6 image, and restore files you need/settings/configurations).