All of them? Code is wrong? You can't download them? Do you use the last hotfix for the game? Do you put them in your Units folder? Maybe they don't work right in other folders, I always use them there.
Roads one, sovereigns regenerating more mana and diplomacy one weren't tested thoroughly. The rest do work at least for me.
One more file, City lvlupbonuses, now you can upgrade food, prestige and there's a new bonus that exchanges gold for materials+metal+crystals (for example lvl 2 city with this gets -3 gold, +1 material, +1 metal, +1 refyned crystal):
http://dl.dropbox.com/u/2613529/Elemental/CityLevelUpBonuses.xml
edit: tested basic races, regenerating 3 mana per strategic turn, it works for altar. Did the same change for everyone so it should be ok.
tested diplomacy mod, no longer getting money on peace treaties, in any case the other way round:
the diplomacy one, doesn't work indeed... I will put that one down, thanks for the feedback 