Lazarus+Firebird+ZeosDBO: Cannot read files in Hangul

When connecting to Firebird using ZeosDBO in Lazarus, if the filename contains Hangul(Korean), the database file cannot be read. Using UTF8ToSys() or Utf8ToAnsi() was of no use. The error occurs when Firebird calls CreateFile(open), though with TIBConnection the file can be read if I apply UTF8ToSys() to DatabaseName.

I liked ZeosDBO as it seems faster that TSQLConection, but now is the time to turn off autocommit and manually do it. Well, considering the origin(a component for Delphi), support for Lazarus is ought to be limited.

Found in following environment:
Lazarus 1.2.4, ZeosDBO 7.1.3a, Firebird 2.5

P.S:Considering the case, the same would happen to files with Chinese or Japanese characters in the name. Pity to CJK users!(including me)