Gettin unkownHostException while trying to translate using microsoft translate API

[Korwin]

i am writing a simple program to translate convert korean text entered to englishi am using microsoft-translator-java-api-0.6.1-jar for tha. even tried it with google translate API and getting the same issue i.e. unkownHostExceptionhere is the servlet code of the post method\[code\] String koreanText=request.getParameter("koreanText"); System.out.println(koreanText); System.setProperty("http.proxyHost", "proxy"); System.setProperty("http.proxyPort", "8080"); Translate.setClientId("client id"); Translate.setClientSecret("client secret"); System.out.println(Language.KOREAN); System.out.println(koreanText);try { **String translatedText = Translate.execute(koreanText, Language.KOREAN, Language.ENGLISH)**; System.out.println(translatedText);} catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace();}\[/code\]the place where am getting the exception is ** marked