Its easy as it misscatherine says, but i'll give you some links to make it easier.
1.: Re-extract ZSZC in a new folder.
2.: Download media from epvp that works with db bot:
(copy it to zszc srodb folder, and write it over ofc)
3.: Download 1.678 patch:
4.: Copy the patch
AND ONLY THE PATCH into ZSZC srodb foler, and run the patch.
Do not copy the silkroad.exe nor the sro_client.exe !
5.: If you have did by mistake, here are the old exe files:
6.: Download db bot, i have uploaded my folder which is working for me:
You know the rest :]
EDIT: The db bot folder and the old exe files aren't scanned by myself, they are my upload. Please scan it yourself, thanks :]