Kolab 3.1 add user; after login Serverfault: STATUS: Mailbox does not exist

[linux at osit.cc]

Hello, 

i installed Kolab 3.1 fersh on debian. On setup-kolab i get an error:

MySQL roundcube Passwort [secret]: 
ERROR 1050 (42S01) at line 204: Table 'system' already exists
[ ok ] Restarting web server: apache2 ... waiting .
update-rc.d: using dependency based boot sequencing
ERROR 1062 (23000) at line 115: Duplicate entry 'syncroton-version' for key 'PRIMARY'
ERROR 1050 (42S01) at line 8: Table 'session' already exists

After that i added some new users. But when they log into Roundcube they all get the same error message:
Serverfault: STATUS: Mailbox does not exist

Have i done something wrong? How can i solve this problem?

Thanks and Regards
boospy
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