I don't really know what You've done but when I used SSL I did it this way (and it worked):

Qt Code:
  1. QNetworkRequest request();
  2. request.setSslConfiguration(QSslConfiguration::defaultConfiguration());
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and in application directory I put these files (these are OpenSSL library files):
libeay32.dll
ssleay32.dll

from: http://www.npcglib.org/~stathis/blog...piled-openssl/

btw. I think that You just did nothing in this code:
Qt Code:
  1. QSslConfiguration sslConfiguration(QSslConfiguration::defaultConfiguration());
  2. sslConfiguration.setProtocol(QSsl::TlsV1_2);
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because You created object that is not used anywhere.