DomainKey result: none (no signature)

[Azurel]

Hello.

I have followed this steps:

http://download1.parallels.com/Ples...inistrator-guide/index.htm?fileName=59433.htm

But what is the "DNS TXT resource records"? My DNS is extern with my domain hoster and not in plesk. What must I do?

EDIT: Under "DNS settings" of a domain there is nothing with TXT

EDIT2: Ah, I must switch ON the dns service ^^