Get Error when click on Get Live Rates for Currency

Hi,

I have got error when i click on Get Live Rates for currency. The Error is :

The remote server returned an error: (407) Proxy Authentication Required.

I have checked in the code then i found that it read xml file from ECB. The Code is ..

HttpWebRequest request = WebRequest.Create("http://www.ecb.int/stats/eurofxref/eurofxref-daily.xml") as HttpWebRequest;

Could you tell me how to get the authentication for ECB xml file?

Also i do not want to update currency through "Get Live Rates" button click event. I want currency will automatically update in database. Please tell me how is this possible.