startClientEncryption() always times-out and doesn't work

socket->startClientEncryption();
socket->waitForEncrypted(5000); //Here time-out.

bool QSslSocket::waitForEncrypted(int msecs)
{
 Q_D(QSslSocket);
 if (!d->plainSocket || d->connectionEncrypted)
 return false;
 if (d->mode == UnencryptedMode && !d->autoStartHandshake)
 return false;
QElapsedTimer stopWatch;
 stopWatch.start();
if (d->plainSocket->state() != QAbstractSocket::ConnectedState) {
 // Wait until we've entered connected state.
 if (!d->plainSocket->waitForConnected(msecs))
 return false;
 }

//Also added here check for timet elapsed, to make this 'timeoutable'
while (!d->connectionEncrypted && stopWatch.elapsed() < msecs) {
 // Start the handshake, if this hasn't been started yet.
 if (d->mode == UnencryptedMode)
 startClientEncryption();
 // Loop, waiting until the connection has been encrypted or an error
 // occurs.
 
//Time out happens here plainSocket waitForReadyRead always times out!!
 //if (!d->plainSocket->waitForReadyRead(qt_subtract_from_timeout(msecs, stopWatch.elapsed())))
 //return false;
 
//This is my attempt to fix this: just repeatedly run 'transmit'
//transmit() has a check inside if there is data to read and reads 
//it when needed. Connection to FTPES and STARTTLS SMTP works fine
//with this fix.!
 d->transmit(); 
 QCoreApplication::processEvents( QEventLoop::AllEvents, 100 );
 }
 return d->connectionEncrypted;
}