I sent Brad one of my model , just now
Waiting for his answer
I tried all the possible settings , no results

However I suppose that many members own UltimeUnrap3d
May anybody else make a simple test

Just load an animated file ( not that simple if possible, mine has abt 6000 tris and 60 bones ) in Ultime, export in FBX format and reload it again in Ultime
See what happen

Thanks in advance