sin光臨天使エンシェル・レナ-Key does not match-How can I crack this game?

http://www.anime-sharing.com/forum/...光臨天使エンシェル・レナ-～reincarnation～-[h-game]-628179/
Hi,
I tried to install and crack this game, applied the newest crack I could find, and started the sinrena.exe to generate a key, which is:
5B9CB-FC425-4EB97-25744

The problem is, that this key is 4 characters longer than there is space in the activation window.
What can I do?
Is it true that this game is uncrackable, as it was stated in some of the threads of this game?
Triangle`s next game they released, Exceed Knights, functions without problems.

With Reincarnation though, I have had my problems getting it cracked so far.

The game i am talking about:
http://www.anime-sharing.com/forum/hentai-games-38/japanese-%5B170728%5D%5Btriangle%5D-sin-光臨天使エンシェル・レナ-–reincarnation–-632697/

So, I tried to install the fandisc of this game and it worked perfectly fine.
I just typed in the code and the id, that was all.
With the main game it seems to be a different Story.
I do not know how this playdrm protection works.
The sinrena.exe generates a Code, but this Code is too Long to fit into the PLAYDRM Activation window.
What can I do?