Hi,
thanks for reply. I've found the missing something: 検
After a bit of googling: 正規のシステムソフトウェアを検知できませんでした。本製品は、正規に提供されているシステムソフトウェアでなければ動作保障できません。
but google translate is a bit wooden...
//edit: it looks like this problem is caused by prometheus CW 5.50...
//edit2: Sooo, I used your contribution to search for "テイルズオブザワールド レディアントマイソロジ 正規のシステムソフトウェアを検知できませんでした" which gave me few japanese sites offering solution, but unfortunately they used megaupload which is down. So I was searching for "tales of the world Radiant Mythology 3 prometheus patch -english" and found
this one which appears to be working. Thanks alot for your help
