I can't remove message

Tue Sep 23 09:58:03 EDT 2008

Hi,

We have mailbox with one new message. Subscriber is not able to 
remove this message. We checked that cyrus (IMAP) doesn't allow 
to store any flags for message. I mean, subscriber can't save this
message. It is still marked as new.

I am wondering what can be wrong? Which of files can be corrupted:

-rw-------  2 cyrus mail 46667 Sep 23 15:07 211.

-rw-------  1 cyrus mail  1332 Sep 23 15:43 cyrus.cache
-rw-------  1 cyrus mail   289 Sep 23 15:08 cyrus.header
-rw-------  1 cyrus mail   176 Sep 23 15:43 cyrus.index

I thought that maybe reconstruct can help but it doesn't.
After reconstruct we still can't delete message. 

Kind Regards,
Henryk