If you had installed Windows Vista and would like to use the weather gadgets in the sidebar, soemtime you may encounter such error “Service Not Available”. this is because this gadgets only works with English (US) format. If you use other format such as English (Australia), you need to change the system locale under “Regional and Language Options” to English (US). Then you can customize the currency, date and time according to your preference.
You can also refer to this link http://support.microsoft.com/kb/931272 from Microsoft.