AFS Logon warnings in event log

I am running OpenAFS version 1.4.0008 on Windows (XP pro SP2) with 
kfw 2.6.5 installed. Integrated login and EnableKFW are enabled (but 
MsLsaImport in KFW is disabled). Everything seems to be working fine 
- I am successfully getting tokens at login time, am able to access 
files. There is one thing which bothers me though. Every hour (logged 
in or not, having valid tokens or not) - I see warnings in the 
application event log:

Source: AFS Logon
Type: Warning
EventID: 1008
Description: (...) Integrated login failed: Client not found in 
Kerberos database.

Shouldn't such events be only created via NPLogonNotify function in 
afsd during Windows login process? Why do I see them?

Thanks,

Beata


Beata A. Pruski
Iowa State University
Information Technology Services
268 Durham Center
Ames, IA 50011-2251
515-294-5919