Do you not have dealer support with this unit ? It's a bit of a surprise that it hasn't been checked out already for you (in this price bracket).

I presume your old 861 was a earlier version so there may be a difference in config files you are loading. You are using the newer config program aren't you ?

The flash upload program is easy and quick enough to use...you could try it and force the firmware to refresh.

Rgds,
Nick