==== Required information ====
- iRedMail version:
iRedMail-0.8.5
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):
LDAP+Gosa
- Linux/BSD distribution name and version:
Debian 7.2
====
I have a bunch of customized IRM + GOSa trying to install SOGo-2.1.1a.:

#nano /etc/apt/sourse.list
deb http://inverse.ca/debian wheezy wheezy
#apt-key adv --keyserver keys.gnupg.net --recv-key 0x810273C4
#apt-get update
#apt-get install sogo
Creat MYSQL base sogo.
edit /etc/sogo/sogo.conf:
{
  /* *********************  Main SOGo configuration file  **********************
   *                                                                           *
   * Since the content of this file is a dictionary in OpenStep plist format,  *
   * the curly braces enclosing the body of the configuration are mandatory.   *
   * See the Installation Guide for details on the format.                     *
   *                                                                           *
   * C and C++ style comments are supported.                                   *
   *                                                                           *
   * This example configuration contains only a subset of all available        *
   * configuration parameters. Please see the installation guide more details. *
   *                                                                           *
   * ~sogo/GNUstep/Defaults/.GNUstepDefaults has precedence over this file,    *
   * make sure to move it away to avoid unwanted parameter overrides.          *
   *                                                                           *
   * **************************************************************************/

  /* Database configuration (mysql:// or postgresql://) */
  SOGoProfileURL = "mysql://sogo:sogopas@localhost:3306/sogo/sogo_user_profile";
  OCSFolderInfoURL = "mysql://sogo:sogopa@localhost:3306/sogo/sogo_folder_info";
  OCSSessionsFolderURL = "mysql://sogo:sogopa@localhost:3306/sogo/sogo_sessions_folder";

  /* Mail */
  SOGoDraftsFolderName = Drafts;
  SOGoSentFolderName = Sent;
  SOGoTrashFolderName = Trash;
  SOGoIMAPServer = localhost;
  SOGoSieveServer = sieve://127.0.0.1:4190;
  SOGoSMTPServer = 127.0.0.1;
  SOGoMailDomain = post-domain;
  SOGoMailingMechanism = smtp;
  SOGoForceExternalLoginWithEmail = NO;
  SOGoMailSpoolPath = /var/spool/sogo;
  NGImap4ConnectionStringSeparator = "/";

  SOGoAppointmentSendEMailNotifications = NO;
  SOGoACLsSendEMailNotifications = NO;

  /* Authentication */
  SOGoPasswordChangeEnabled = YES;

  /* LDAP authentication example */
  SOGoUserSources = (
    {
      type = ldap;
      CNFieldName = cn;
      UIDFieldName = uid;
      IDFieldName = uid;
      bindFields = (uid, mail);
      baseDN = "ou=people,dc=domail,dc=com";
      bindDN = "cn=admin,dc=domain,dc=com";
      bindPassword = password;
      canAuthenticate = YES;
      displayName = "Shared Addresses";
      hostname = ldap://ip-gosa:389;
      id = public;
      isAddressBook = YES;
    }
  );

  /* SQL authentication example */
  /*  These database columns MUST be present in the view/table:
   *    c_uid - will be used for authentication -  it's the username or username@domain.tld)
   *    c_name - which can be identical to c_uid -  will be used to uniquely identify entries
   *    c_password - password of the user, plain-text, md5 or sha encoded for now
   *    c_cn - the user's common name - such as "John Doe"
   *    mail -  the user's mail address
   *  See the installation guide for more details
   */
  //SOGoUserSources =
  //  (
  //    {
  //      type = sql;
  //      id = directory;
  //      viewURL = "postgresql://sogo:sogo@127.0.0.1:5432/sogo/sogo_view";
  //      canAuthenticate = YES;
  //      isAddressBook = YES;
  //      userPasswordAlgorithm = md5;
  //    }
  //  );

  /* Web Interface */
  SOGoPageTitle = SOGo;
  SOGoVacationEnabled = YES;
  SOGoForwardEnabled = YES;
  SOGoSieveScriptsEnabled = YES;
  SOGoMailAuxiliaryUserAccountsEnabled = YES;

  /* General */
  SOGoLanguage = Russian;
  SOGoTimeZone = Europe/Kiev;
  SOGoCalendarDefaultRoles = (
    PublicDAndTViewer,
    ConfidentialDAndTViewer
  );
  //SOGoSuperUsernames = (sogo1, sogo2); // This is an array - keep the parens!
  //SxVMemLimit = 384
 
  /* Debug */
  SOGoDebugRequests = YES;
  SoDebugBaseURL = YES;
  ImapDebugEnabled = YES;
  LDAPDebugEnabled = YES;
  PGDebugEnabled = YES;
  MySQL4DebugEnabled = YES;
  SOGoUIxDebugEnabled = YES;
  WODontZipResponse = YES;
  WOLogFile = /var/log/sogo/sogo.log;
}

judging from logs everything works, but I can not get to the web interface.

#cat /etc/apache2/conf.d/SOGo.conf
Alias /SOGo.woa/WebServerResources/ \
      /usr/lib/GNUstep/SOGo/WebServerResources/
Alias /SOGo/WebServerResources/ \
      /usr/lib/GNUstep/SOGo/WebServerResources/
AliasMatch /SOGo/so/ControlPanel/Products/(.*)/Resources/(.*) \
           /usr/lib/GNUstep/SOGo/$1.SOGo/Resources/$2

<Directory /usr/lib/GNUstep/SOGo/>
    AllowOverride None
    Order deny,allow
    Allow from all

    # Explicitly allow caching of static content to avoid browser specific behavior.
    # A resource's URL MUST change in order to have the client load the new version.
    <IfModule expires_module>
      ExpiresActive On
      ExpiresDefault "access plus 1 year"
    </IfModule>
</Directory>

<LocationMatch "^/SOGo/so/ControlPanel/Products/.*UI/Resources/.*\.(jpg|png|gif|css|js)">
  SetHandler default-handler
</LocationMatch>

## Uncomment the following to enable proxy-side authentication, you will then
## need to set the "SOGoTrustProxyAuthentication" SOGo user default to YES and
## adjust the "x-webobjects-remote-user" proxy header in the "Proxy" section
## below.
#<Location /SOGo>
#  AuthType XXX
#  Require valid-user
#  SetEnv proxy-nokeepalive 1
#  Allow from all
#</Location>

ProxyRequests Off
SetEnv proxy-nokeepalive 1
ProxyPreserveHost On

# When using CAS, you should uncomment this and install cas-proxy-validate.py
# in /usr/lib/cgi-bin to reduce server overloading
#
# ProxyPass /SOGo/casProxy http://localhost/cgi-bin/cas-proxy-validate.py
# <Proxy http://localhost/app/cas-proxy-validate.py>
#   Order deny,allow
#   Allow from your-cas-host-addr
# </Proxy>

ProxyPass /SOGo http://127.0.0.1:20000/SOGo retry=0

<Proxy http://127.0.0.1:20000/SOGo>
## adjust the following to your configuration
  RequestHeader set "x-webobjects-server-port" "443"
  RequestHeader set "x-webobjects-server-name" "ip-post-server"
  RequestHeader set "x-webobjects-server-url" "https://ip-post-server"

## When using proxy-side autentication, you need to uncomment and
## adjust the following line:
#  RequestHeader set "x-webobjects-remote-user" "%{REMOTE_USER}e"

  RequestHeader set "x-webobjects-server-protocol" "HTTP/1.0"

  AddDefaultCharset UTF-8

  Order allow,deny
  Allow from all
</Proxy>

# For apple autoconfiguration
<IfModule rewrite_module>
  RewriteEngine On
  RewriteRule ^/.well-known/caldav/?$ /SOGo/dav [R=301]
</IfModule>

help! Where is the mistake?