> db.setConnection(new ConnectionDescriptor(
> "jdbc:firebirdsql:192.168.0.6:C:\\Data\\DB\\PRODUCTION.FDB",
> "sysdba", null, true, "org.firebirdsql.jdbc.FBDriver",
> ConnectionDescriptor.arrayToProperties(new String[][] {
> {"encoding", "NONE"}, {"charset", "ISO8859_1"},})));

Should be

{"encoding", "NONE"}, {"charSet", "ISO-8859-1"}

encoding is Firebird encoding, charSet (name is case sensitive) is Java
charset.

Roman