How to solve the problem: Server returned HTTP response code: 503 for URL?

I want to use the Google Voice API to convert text to speech and I get the following error:

java.io.IOException: Server returned HTTP response code: 503 for URL: http://ipv4.google.com/sorry/index?continue=http://translate.google.com.mx/translate_tts%3Fie%3DUTF-8%26q%3DHola%2520Fuentes%26tl%3Des%26total%3D1%26idx%3D0%26textlen%3D6%26prev%3Dinput&q=EgS10fapGKPwwtgFIhkA8aeDSxYTbf8ZfB0ElXvKRZRxHIHvFAl-MgFy
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1876)
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1474)
    at multimedia.textoaVoz.getLenguaje(textoaVoz.java:35)
    at multimedia.textoaVoz.Lee(textoaVoz.java:56)
    at klip.iniciar.main(iniciar.java:24)

Someone to help me solve it?