The compability chart shows this map is ok for nc 7.9 onwards
So, I'm not sure if 885.4010 should work for nc 7.825.
Did you also patch your 7.825 navcore?
If that doesn't work, make sure you have a backup of your system and try to install a newer nc.
I used 9.051 successfully on old devices but maybe newer will work as well - trial & error ......