At least I can't speak french, so I drove it through google translator:

subfolder listing

impossible to see the mails of a folder, can not create a subfolder, no errors on the browser or the log files.

A little more information should be provided by you.

What browser do you use?
Does it occur with other browsers too?
Is this reproduce able for all users or only one?
Can you see your emails via another IMAP client like Thunderbird?

thank you for your mail, but i'm not a good english, so :

What browser do you use? : firefox 3.6 or 5 IE6 or 7 or 8 it's the same impossible to see the mails in the subfolder, can create a subfolder, remove folder its put in end trash."name of folder"
Does it occur with other browsers too? yes
Is this reproduce able for all users or only one? for all users.
Can you see your emails via another IMAP client like Thunderbird? yes,

thank.

informations :
version SOGo 1.3.7 in debain machine
IMAP cyrus in Debian machine

I never saw something like this.
We use cyrus too, but on solaris.

Which version of cyrus are you using?

souhaib22: please try a more recent versoin of SOGo and SOPE, SOGo 1.3.12c has been released last week. This might fix your issue.

it's resovlet with SOGO 1.3.9 with thnx for all.

Christian Mack : Cyrus version
dpkg -l 'cyrus' 'sasl' 'postfix' |grep "^ii"
ii cyrus-admin-2.2 2.2.13-19+squeeze2 Cyrus mail system - administration tools
ii cyrus-clients-2.2 2.2.13-19+squeeze2 Cyrus mail system (test clients)
ii cyrus-common-2.2 2.2.13-19+squeeze2 Cyrus mail system - common files
ii cyrus-imapd-2.2 2.2.13-19+squeeze2 Cyrus mail system - IMAP support
ii cyrus-pop3d-2.2 2.2.13-19+squeeze2 Cyrus mail system - POP3 support
ii libcyrus-imap-perl22 2.2.13-19+squeeze2 Interface to Cyrus imap client imclient library
ii libsasl2-2 2.1.23.dfsg1-7 Cyrus SASL - authentication abstraction library
ii libsasl2-modules 2.1.23.dfsg1-7 Cyrus SASL - pluggable authentication modules
ii sasl2-bin 2.1.23.dfsg1-7 Cyrus SASL - administration programs for SASL users database