ok, i figured out how to build the new units, infantry must be built by forts, tanks by factorires.
I started a new game, same settings but as Hazat this time, and started conquering immediately, everything went ok, i was first in the rankings, but then it crashed
i also found this
http://www.noblearmada.com/
it's another game set in the Fading Suns universe, but it isn't sure if it will be released.