Here you can download client for Dragomon Hunter Hong Kong server.
Dragomon Hunter Hong Kong server
Download the client here: http://www.alta.hk/client/download.php?game=DS

Chose -  Google 雲端海外下載點

or full patched client (7/18/2015) here.

When installing patch you must follow that. Don`t forget to chose your dragon slayer game folder C:\Alta\DSOnline
Dragomon Hunter Hong Kong server
Dragomon Hunter Hong Kong server

After that need to wait for window to disappear. If client still patching it means it checking files/downloaded some files that not in patch/downloading bin.

Can`t enter/update?  look here
http://pastebin.com/QZP0zCQc