Failed login imap.

[sam]

HI,

Yesterday I installed cyrus-imapd22, sasl2+saslauthd and postfix2.1.4 in 
FreeBSd 5.3 system. When I tried to login from a remote system (using 
telnet/imtest and Mozilla mail client, it has the error showing:
"pop3[43416]: Unable to locate maildrop for nuser: Mailbox does not exist"

I have created an user called "nuser" in the cyradm prompt.

The cyradm command I used is:
 > cm user.nuser
createmailbox: Mailbox already exists
 > quit
This is only verify that Mailbox of nuser does really exist.

The Mailbox I created is shown as below:
# ls -l /var/spool/imap/
total 26
drwxr-x--- 13 cyrus cyrus 512 Oct 8 22:31 ./
drwxr-xr-x 11 root wheel 512 Oct 6 23:07 ../
drwx------ 2 cyrus cyrus 512 Oct 8 14:55 user^bob/
drwx------ 2 cyrus cyrus 512 Oct 8 22:31 user^nuser/

What can I do to correct this error?

Your help is greately appreciated.
Thanks
Sam.