Server says that while you have added races into DB tables, they are still, according to server, not supposed to exist. Which simply means you have quite likely either missed something DBC or something in core. Double check ChRaces.dbc, factions for your race, display and model IDs for your race, ChrBaseInfo.dbc... And all other things which have anything to do with races (there is hell lot of such DBCs). Luckily, it seems that problem is with race itself, not with race/class combination, so you can exclude tables which have something to do with classes.