[imp] imap error

[dimitra deka]

I have a problem with imap. Some users can't see their inbox! They are
authenticated but they can't go any furhter and see their inbox!
In the log file, I get the error "

Nov  5 15:37:10 ucnetnom imapd[24349]: Authenticated user=menes host=knossos.ucn
et.uoc.gr [147.52.80.1]
Nov  5 15:39:31 ucnetnom imapd[24349]: Command stream end of file, while reading
 line user=menes host=knossos.ucnet.uoc.gr [147.52.80.1]
 "
 
why this happens?

could anyone help me?
dimi