session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at /www/htdocs/w00a7c22/piwik/libs/Zend/Config.php:184) 
in '/www/htdocs/w00a7c22/piwik/index.php' at the line 43

#0  Piwik_ErrorHandler(2, session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at /www/htdocs/w00a7c22/piwik/libs/Zend/Config.php:184), /www/htdocs/w00a7c22/piwik/index.php, 43, Array ([GLOBALS] => Array ( *RECURSION*,[_ENV] => Array ([APACHE_PID_FILE] => /var/run/apache2.pid,[APACHE_RUN_USER] => www-data,[APACHE_LOG_DIR] => /var/log/apache2,[PATH] => /usr/local/bin:/usr/bin:/bin,[PWD] => /,[APACHE_RUN_GROUP] => www-data,[LANG] => C,[SHLVL] => 1,[APACHE_LOCK_DIR] => /var/lock/apache2,[APACHE_RUN_DIR] => /var/run/apache2,[_] => /usr/sbin/apache2),[HTTP_ENV_VARS] => Array ([APACHE_PID_FILE] => /var/run/apache2.pid,[APACHE_RUN_USER] => www-data,[APACHE_LOG_DIR] => /var/log/apache2,[PATH] => /usr/local/bin:/usr/bin:/bin,[PWD] => /,[APACHE_RUN_GROUP] => www-data,[LANG] => C,[SHLVL] => 1,[APACHE_LOCK_DIR] => /var/lock/apache2,[APACHE_RUN_DIR] => /var/run/apache2,[_] => /usr/sbin/apache2),[_POST] => Array (),[HTTP_POST_VARS] => Array (),[_GET] => Array (),[HTTP_GET_VARS] => Array (),[_COOKIE] => Array (),[HTTP_COOKIE_VARS] => Array (),[_SERVER] => Array ([UNIQUE_ID] => TyL9xlUNiZgAAEpuDWsAAAAD,[GEOIP_ADDR] => 38.107.179.207,[GEOIP_CONTINENT_CODE] => NA,[GEOIP_COUNTRY_CODE] => US,[GEOIP_COUNTRY_NAME] => United States,[HTTP_X_CC_ID] => ccc01-01,[HTTP_HOST] => stats.kwai-design.de,[HTTP_USER_AGENT] => CCBot/1.0 (+http://www.commoncrawl.org/bot.html),[HTTP_ACCEPT] => text/html,application/xhtml+xml,text/xml;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5,[HTTP_ACCEPT_LANGUAGE] => en-us,en;q=0.5,[HTTP_ACCEPT_ENCODING] => gzip,[HTTP_ACCEPT_CHARSET] => ISO-8859-1,utf-8;q=0.7,*;q=0.7,[HTTP_CONNECTION] => close,[HTTP_CACHE_CONTROL] => no-cache,[HTTP_PRAGMA] => no-cache,[PATH] => /usr/local/bin:/usr/bin:/bin,[SERVER_SIGNATURE] => ,[SERVER_SOFTWARE] => Apache,[SERVER_NAME] => stats.kwai-design.de,[SERVER_ADDR] => 85.13.137.152,[SERVER_PORT] => 80,[REMOTE_ADDR] => 38.107.179.207,[DOCUMENT_ROOT] => /www/htdocs/w00a7c22/piwik/,[SERVER_ADMIN] => webmaster@stats.kwai-design.de,[SCRIPT_FILENAME] => /www/htdocs/w00a7c22/piwik/index.php,[REMOTE_PORT] => 51288,[GATEWAY_INTERFACE] => CGI/1.1,[SERVER_PROTOCOL] => HTTP/1.1,[REQUEST_METHOD] => GET,[QUERY_STRING] => ,[REQUEST_URI] => /,[SCRIPT_NAME] => /index.php,[PHP_SELF] => /index.php,[REQUEST_TIME] => 1327693254,[argv] => Array (),[argc] => 0),[HTTP_SERVER_VARS] => Array ([UNIQUE_ID] => TyL9xlUNiZgAAEpuDWsAAAAD,[GEOIP_ADDR] => 38.107.179.207,[GEOIP_CONTINENT_CODE] => NA,[GEOIP_COUNTRY_CODE] => US,[GEOIP_COUNTRY_NAME] => United States,[HTTP_X_CC_ID] => ccc01-01,[HTTP_HOST] => stats.kwai-design.de,[HTTP_USER_AGENT] => CCBot/1.0 (+http://www.commoncrawl.org/bot.html),[HTTP_ACCEPT] => text/html,application/xhtml+xml,text/xml;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5,[HTTP_ACCEPT_LANGUAGE] => en-us,en;q=0.5,[HTTP_ACCEPT_ENCODING] => gzip,[HTTP_ACCEPT_CHARSET] => ISO-8859-1,utf-8;q=0.7,*;q=0.7,[HTTP_CONNECTION] => close,[HTTP_CACHE_CONTROL] => no-cache,[HTTP_PRAGMA] => no-cache,[PATH] => /usr/local/bin:/usr/bin:/bin,[SERVER_SIGNATURE] => ,[SERVER_SOFTWARE] => Apache,[SERVER_NAME] => stats.kwai-design.de,[SERVER_ADDR] => 85.13.137.152,[SERVER_PORT] => 80,[REMOTE_ADDR] => 38.107.179.207,[DOCUMENT_ROOT] => /www/htdocs/w00a7c22/piwik/,[SERVER_ADMIN] => webmaster@stats.kwai-design.de,[SCRIPT_FILENAME] => /www/htdocs/w00a7c22/piwik/index.php,[REMOTE_PORT] => 51288,[GATEWAY_INTERFACE] => CGI/1.1,[SERVER_PROTOCOL] => HTTP/1.1,[REQUEST_METHOD] => GET,[QUERY_STRING] => ,[REQUEST_URI] => /,[SCRIPT_NAME] => /index.php,[PHP_SELF] => /index.php,[REQUEST_TIME] => 1327693254,[argv] => Array (),[argc] => 0),[_FILES] => Array (),[HTTP_POST_FILES] => Array (),[_REQUEST] => Array (),[piwik_minimumPHPVersion] => 5.1.3,[piwik_currentPHPVersion] => 5.3.8-nmm1,[piwik_zend_compatibility_mode] => ,[_Event_Dispatcher] => Array ([NotificationClass] => Event_Notification),[HTTP_SESSION_VARS] => Array (),[_SESSION] => Array ()))
#1  session_start() called at [/www/htdocs/w00a7c22/piwik/index.php:43]