Hi Ubernator,
Please see if anything in this post can help you:
http://www.onrpg.com/boards/76157-23/#post887516 (Full ROHAN translation project (INCOMPLETE) / Guide)
From what the Rohan service center said, it sounds like you could also have a port blocked that the game requires to be open. Perhaps try temporarily disabling all hardware / software firewalls to see if that clears things up. I wouldn't recommend leaving it that way but at least you would discover where the problem lies.
Sorry sylentgti, I am not familiar with that error that you are getting. It looks like the Rohan service center is saying that something is blocking the updater? Perhaps this is another port / firewall issue. I would again try to temporarily disable your firewalls to see if this fixes the error.