Roman, Type 1 Gov and no Faction Units - why?

[azmo]

hi
ich have the following problem:

i captures taras (some other cities too), and built the gov type 1 building (the one that takes 10 turns to build).

after it was finished, i built all other builings available there too.
but there were NO factional barraks available -
is it a bug or is it a feature, and if it is a feature, which requirements must be met besides the type1 gov to build factional units?

this is getting quite anoying as i cannot build anything except the low local stuff.
my start provinces produce faction troops, though..

EDIT:
i tried some times before, same result.