It would be a lot easier if you were to also tell us the exact error message, now you leave us guessing which makes it hard to help you. We do not have a crystal ball...
When I turn on my test server I get this messages in SOGo Log:
Nov 25 00:00:15 sogod [2914]: version 1.3.9 (build root@vizzini.openchange.local 201110291437) -- starting
Nov 25 00:00:15 sogod [2914]: vmem size check enabled: shutting down app when vmem > 384 MB
Nov 25 00:00:23 sogod [2914]: <0x0x98cab94[SOGoProductLoader]> SOGo products loaded from '/usr/lib/GNUstep/SOGo':
Nov 25 00:00:23 sogod [2914]: <0x0x98cab94[SOGoProductLoader]> Mailer.SOGo, AdministrationUI.SOGo, MailerUI.SOGo, SchedulerUI.SOGo, Contacts.SOGo, Appointments.SOGo, MainUI.SOGo, CommonUI.SOGo, PreferencesUI.SOGo, ContactsUI.SOGo, MailPartViewers.SOGo
Nov 25 00:00:27 sogod [2914]: <0x0x998715c[WOWatchDog]> listening on 127.0.0.1:20000
Nov 25 00:00:27 sogod [2914]: <0x0x998715c[WOWatchDog]> watchdog process pid: 2914
Nov 25 00:00:27 sogod [2914]: <0x0x3745a0[WOWatchDogChild]> watchdog request timeout set to 10 minutes
Nov 25 00:00:27 sogod [2914]: <0x0x998715c[WOWatchDog]> preparing 1 children
Nov 25 00:00:27 sogod [2914]: <0x0x998715c[WOWatchDog]> child spawned with pid 3227
And this is my messages log:
Nov 25 00:19:26 testserver slapd[2525]: conn=0 fd=13 ACCEPT from IP=127.0.0.1:41831 (IP=0.0.0.0:389)
Nov 25 00:19:26 testserver slapd[2525]: conn=0 op=0 BIND dn="" method=128
Nov 25 00:19:26 testserver slapd[2525]: conn=0 op=0 RESULT tag=97 err=0 text=
Nov 25 00:19:26 testserver slapd[2525]: conn=0 op=1 SRCH base="ou=groups,dc=testserver,dc=local" scope=2 deref=0 filter="(cn=admin)"
Nov 25 00:19:26 testserver slapd[2525]: conn=0 op=1 SRCH attr=dn
Nov 25 00:19:26 testserver slapd[2525]: conn=1 fd=16 ACCEPT from IP=127.0.0.1:41832 (IP=0.0.0.0:389)
Nov 25 00:19:26 testserver slapd[2525]: conn=1 op=0 BIND dn="" method=128
Nov 25 00:19:26 testserver slapd[2525]: conn=1 op=0 RESULT tag=97 err=0 text=
Nov 25 00:19:26 testserver slapd[2525]: conn=1 op=1 SRCH base="ou=users,dc=testserver,dc=local" scope=2 deref=0 filter="(uid=admin)"
Nov 25 00:19:26 testserver slapd[2525]: conn=1 op=1 SRCH attr=dn
Nov 25 00:19:26 testserver slapd[2525]: conn=0 op=1 SEARCH RESULT tag=101 err=0 nentries=0 text=
Nov 25 00:19:26 testserver slapd[2525]: conn=1 op=1 SEARCH RESULT tag=101 err=0 nentries=1 text=
Nov 25 00:19:26 testserver slapd[2525]: conn=2 fd=18 ACCEPT from IP=127.0.0.1:41833 (IP=0.0.0.0:389)
Nov 25 00:19:26 testserver slapd[2525]: conn=2 op=0 BIND dn="uid=admin,ou=users,dc=testserver,dc=local" method=128
Nov 25 00:19:26 testserver slapd[2525]: conn=2 op=0 BIND dn="uid=admin,ou=Users,dc=testserver,dc=local" mech=SIMPLE ssf=0
Nov 25 00:19:26 testserver slapd[2525]: conn=2 op=0 RESULT tag=97 err=0 text=
Nov 25 00:19:26 testserver slapd[2525]: conn=2 op=1 UNBIND
Nov 25 00:19:26 testserver slapd[2525]: conn=2 fd=18 closed
On thunderbird side everything seems to work correctly (there is nothing in Thunderbird Error Consol) but I can't use "Sogo-Integrator" advantage (shared folder, shared calendar).