Community Auth Database Problem

Hello everyone,

at since, i try to install community_auth into the codeigniter fw.

i follow instruction and i setup the database and create it.

But I take an error like this:
Wher is the mistake  ?

My Best Regards,

Error:

---

A PHP Error was encountered
Severity: Warning
Message: date(): Invalid date.timezone value 'UTC', we selected the timezone 'UTC' for now.
Filename: models/Auth_model.php
Line Number: 225
Backtrace:
File: /www/application/third_party/community_auth/models/Auth_model.php
Line: 225
Function: date
File: /www/application/third_party/community_auth/libraries/Authentication.php
Line: 413
Function: clear_expired_holds
File: /www/application/third_party/community_auth/core/Auth_Controller.php
Line: 489
Function: current_hold_status
File: /www/application/controllers/Examples.php
Line: 297
Function: setup_login_form
File: /www/index.php
Line: 292
Function: require_once

Fatal error: date(): Timezone database is corrupt - this should *never* happen! in /www/application/third_party/community_auth/models/Auth_model.php on line 225
A PHP Error was encountered
Severity: Warning
Message: Cannot modify header information - headers already sent by (output started at /www/system/core/Exceptions.php:272)
Filename: core/Common.php
Line Number: 564
Backtrace:
A PHP Error was encountered
Severity: Error
Message: date(): Timezone database is corrupt - this should *never* happen!
Filename: models/Auth_model.php
Line Number: 225
Backtrace:

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