1:27 proxy can't be used either. There may be protection software to stop their software or not use agents. You should contact their customer service to check it for you.
2: It may be the problem of parsing the file. You can open the reamlist.wtf file in the game directory data/zhtw with text, and change the content to:
Set the realist tw.logon.worldofwarcraft.com.
Set patch list tw.version.worldofwarcraft.com
Set realmlistbn ""
Set portal tw
If there is a data/enus directory, copy reamlist.wtf into the data/enus overlay of the table service.