[OpenAFS] Ticket contained unknownd key version

[wangkun@legend.com.cn]

My afs server can not work perperly.
I issue following commonds:
     %klog admin
        password *****
     %tokens
      Tokens help by the Cache Manager:
      User's(AFS ID 1)tokens for afs@... Expires Mar 6 16:07]


up to now,it seems to work well,but problem comes when going on
     %bos status mymachine
      bos:failed to contact host's bosserver(ticket contained unknown key
version number)

     Most commond will not work at all.How to deal with it without
installing afs again.