Error Non-static method ....

[unix_agent]

Hi,
i use an apache 2 and installed PHP in cgi-mode manually. Now i want to use it with OTRS (ticket system) but i get following error codes:

Strict Standards: Non-static method pfcGlobalConfig::Instance() should not be called statically, assuming $this from incompatible context in D:\Program Files (x86)\OTRS\Apache\htdocs\phpfreechat\src\phpfreechat.class.php on line 44

Strict Standards: Non-static method pfcI18N::Init() should not be called statically, assuming $this from incompatible context in D:\Program Files (x86)\OTRS\Apache\htdocs\phpfreechat\src\pfcglobalconfig.class.php on line 649

Strict Standards: Non-static method pfcI18N::GetAcceptedLanguage() should not be called statically, assuming $this from incompatible context in D:\Program Files (x86)\OTRS\Apache\htdocs\phpfreechat\src\pfci18n.class.php on line 59

Strict Standards: Non-static method pfcI18N::GetDefaultLanguage() should not be called statically, assuming $this from incompatible context in D:\Program Files (x86)\OTRS\Apache\htdocs\phpfreechat\src\pfci18n.class.php on line 60

Strict Standards: Non-static method pfcContainer::Instance() should not be called statically, assuming $this from incompatible context in D:\Program Files (x86)\OTRS\Apache\htdocs\phpfreechat\src\pfcglobalconfig.class.php on line 687

Strict Standards: Non-static method pfcContainer::Instance() should not be called statically, assuming $this from incompatible context in D:\Program Files (x86)\OTRS\Apache\htdocs\phpfreechat\src\pfcglobalconfig.class.php on line 934

Strict Standards: Non-static method pfcI18N::GetAcceptedLanguage() should not be called statically, assuming $this from incompatible context in D:\Program Files (x86)\OTRS\Apache\htdocs\phpfreechat\src\pfcglobalconfig.class.php on line 939

Strict Standards: Non-static method pfcContainer::Instance() should not be called statically, assuming $this from incompatible context in D:\Program Files (x86)\OTRS\Apache\htdocs\phpfreechat\src\pfcglobalconfig.class.php on line 738

Strict Standards: Non-static method pfcUserConfig::Instance() should not be called statically, assuming $this from incompatible context in D:\Program Files (x86)\OTRS\Apache\htdocs\phpfreechat\src\phpfreechat.class.php on line 47

Strict Standards: Non-static method pfcGlobalConfig::Instance() should not be called statically, assuming $this from incompatible context in D:\Program Files (x86)\OTRS\Apache\htdocs\phpfreechat\src\pfcuserconfig.class.php on line 21

Strict Standards: Non-static method pfcGlobalConfig::Instance() should not be called statically, assuming $this from incompatible context in D:\Program Files (x86)\OTRS\Apache\htdocs\phpfreechat\src\pfcuserconfig.class.php on line 58

Strict Standards: Non-static method pfcGlobalConfig::Instance() should not be called statically, assuming $this from incompatible context in D:\Program Files (x86)\OTRS\Apache\htdocs\phpfreechat\src\pfcuserconfig.class.php on line 58

Strict Standards: Non-static method pfcGlobalConfig::Instance() should not be called statically, assuming $this from incompatible context in D:\Program Files (x86)\OTRS\Apache\htdocs\phpfreechat\src\pfcuserconfig.class.php on line 58

Strict Standards: Non-static method pfcGlobalConfig::Instance() should not be called statically, assuming $this from incompatible context in D:\Program Files (x86)\OTRS\Apache\htdocs\phpfreechat\src\pfcuserconfig.class.php on line 58

Strict Standards: Non-static method pfcGlobalConfig::Instance() should not be called statically, assuming $this from incompatible context in D:\Program Files (x86)\OTRS\Apache\htdocs\phpfreechat\src\pfcuserconfig.class.php on line 58

Strict Standards: Non-static method pfcGlobalConfig::Instance() should not be called statically, assuming $this from incompatible context in D:\Program Files (x86)\OTRS\Apache\htdocs\phpfreechat\src\phpfreechat.class.php on line 99

Strict Standards: Non-static method pfcUserConfig::Instance() should not be called statically, assuming $this from incompatible context in D:\Program Files (x86)\OTRS\Apache\htdocs\phpfreechat\src\phpfreechat.class.php on line 100