1. Make sure the world map text files are okay. (Copy them from another client if you don't know how to play with them).
Media\server_dep\silkroad\textdata\worldmap_%%
2. Make sure RefRegion.txt is okay, (Copy _RefRegion table into it if you don't know how to play with it).
3. Last thing and I don't know if it may crash your client, Make sure map files are okay, too.