can't start "淫夢学園「だめ…こんなになっちゃうのは夢の中だけなの…！」"

[nasty.nlp]

i cannot start this game
it said about

名前の変更 [Rename / Change Name]
主人公の名前を入力してください。　 [Fill the heroic name]
全角4文字以内 [Maximum 4 Characters]

Note : this content is found on game

can anyone fixed it

http://www.anime-sharing.com/forum/hentai-games-38/japanese-%5B%E3%83%AB%E3%83%8D%5D-%E6%B7%AB%E5%A4%A2%E5%AD%A6%E5%9C%92%E3%80%8C%E3%81%A0%E3%82%81%E2%80%A6%E3%81%93%E3%82%93%E3%81%AA%E3%81%AB%E3%81%AA%E3%81%A3%E3%81%A1%E3%82%83%E3%81%86%E3%81%AE%E3%81%AF%E5%A4%A2%E3%81%AE%E4%B8%AD%E3%81%A0%E3%81%91%E3%81%AA%E3%81%AE%E2%80%A6%EF%BC%81%E3%80%8D-dummycut-nodvd-%5B080229%5D-70686/