Problem with constantly trying to login to Domain

Hello Forum,

I have successfuly running a instance of CopSSH on a Windows Server 2008 R2 64 Bit with public/private key authentication.

Here is a part of my ssh_config:

RSAAuthentication yes
PubkeyAuthentication yes
AuthorizedKeysFile    .ssh/authorized_keys

And my passwd file:

SvcCOPSSH:unused_by_nt/2000/xp:1017:545:U-LVTSVINTRA\SvcCOPSSH,S-1-5-21-4036840174-3772900335-2714778364-1017:/var/:/bin/false
lvt_itpr:unused_by_nt/2000/xp:30447:545:U-ZDVW2K\lvt_itpr,S-1-5-21-790525478-776561741-839522115-30447:/cygdrive/e/Transfer_LIKV/:/bin/bash

The User lvt_itpr is the user which is used for connect via pub/priv key.

But the User SvcCopSSH is constantly trying to connect to Domain Server. I have this errors on the Domain Server:

11/28 13:26:06 [LOGON] DOMAIN: SamLogon: Network logon of SERVER\SvcCOPSSH from SERVER Returns 0xC0000064

11/28 13:26:06 [LOGON] DOMAIN: SamLogon: Network logon of SERVER\SvcCOPSSH from SERVER Returns 0xC0000064

11/28 13:26:06 [LOGON] DOMAIN: SamLogon: Network logon of SERVER\SvcCOPSSH from SERVER Returns 0xC0000064

11/28 13:26:06 [LOGON] DOMAIN: SamLogon: Network logon of SERVER\SvcCOPSSH from SERVER Returns 0xC0000064

11/28 13:26:06 [LOGON] DOMAIN: SamLogon: Network logon of SERVER\SvcCOPSSH from SERVER Returns 0xC0000064

11/28 13:34:26 [LOGON] DOMAIN: SamLogon: Network logon of SERVER\SvcCOPSSH from SERVER Returns 0xC0000064

11/28 13:34:26 [LOGON] DOMAIN: SamLogon: Network logon of SERVER\SvcCOPSSH from SERVER Returns 0xC0000064

11/28 13:34:26 [LOGON] DOMAIN: SamLogon: Network logon of SERVER\SvcCOPSSH from SERVER Returns 0xC0000064

11/28 13:34:26 [LOGON] DOMAIN: SamLogon: Network logon of SERVER\SvcCOPSSH from SERVER Returns 0xC0000064

11/28 13:34:26 [LOGON] DOMAIN: SamLogon: Network logon of SERVER\SvcCOPSSH from SERVER Returns 0xC0000064

It is remarkable, that these login-times have nothing to do with the logins of the lvt_itpr user via priv/pub-key. And they are always 5 times...

Any help is welcome!

Greetings

Tobi

(I have posted this problem three or four days ago, but it doesn't show up here. So, sorry for the eventual double-post)