After I click "send" with debug on, I get:
Message:SQLSTATE[23000]: Integrity constraint violation: 1048 Column 'id' cannot be nullFile:/srv/disk1/1746522/www/colossus.fi/ow/ow_core/database.phpLine:723Trace:#0 /srv/disk1/1746522/www/colossus.fi/ow/ow_core/database.php(723): PDOStatement->execute()
#1 /srv/disk1/1746522/www/colossus.fi/ow/ow_core/database.php(476): OW_Database->execute('INSERT INTO `tu...', Array)
#2 /srv/disk1/1746522/www/colossus.fi/ow/ow_core/database.php(512): OW_Database->insert('INSERT INTO `tu...', Array)
#3 /srv/disk1/1746522/www/colossus.fi/ow/ow_core/base_dao.php(216): OW_Database->insertObject('tucg_blogs_post', Object(ADVANCEDBLOGS_BOL_Post))
#4 /srv/disk1/1746522/www/colossus.fi/ow/ow_plugins/advancedblogs/bol/post_service.php(97): OW_BaseDao->save(Object(ADVANCEDBLOGS_BOL_Post))
#5 /srv/disk1/1746522/www/colossus.fi/ow/ow_plugins/advancedblogs/controllers/save.php(390): ADVANCEDBLOGS_BOL_PostService->save(Object(ADVANCEDBLOGS_BOL_Post))
#6 /srv/disk1/1746522/www/colossus.fi/ow/ow_plugins/advancedblogs/controllers/save.php(119): SaveForm->process(Object(ADVANCEDBLOGS_CTRL_Save))
#7 [internal function]: ADVANCEDBLOGS_CTRL_Save->index(Array)
#8 /srv/disk1/1746522/www/colossus.fi/ow/ow_core/request_handler.php(250): ReflectionMethod->invokeArgs(Object(ADVANCEDBLOGS_CTRL_Save), Array)
#9 /srv/disk1/1746522/www/colossus.fi/ow/ow_core/request_handler.php(226): OW_RequestHandler->processControllerAction(Object(ReflectionMethod), Object(ADVANCEDBLOGS_CTRL_Save))
#10 /srv/disk1/1746522/www/colossus.fi/ow/ow_core/application.php(346): OW_RequestHandler->dispatch()
#11 /srv/disk1/1746522/www/colossus.fi/ow/index.php(76): OW_Application->handleRequest()
#12 {main}Type:PDOException