Why ProxySettings doesn't work in EmbeddedWB ? (Delphi)

Question

This is my code :

EmbeddedWB1.ProxySettings.Address:='119.112.222.146';
EmbeddedWB1.ProxySettings.Port:=9415;
EmbeddedWB1.ProxySettings.AutoLoadProxy:=true;
EmbeddedWB1.RefreshProxy;
EmbeddedWB1.Navigate('www.whatismyipaddress.com'); 

But when i navigated the site , my ip address did NOT change ! whereas , when i set that proxy settings(119.112.222.146:9415) for IE manually , it's work gracefully !!

What's wrong ?