Another information :
My code :
SSLFTPClient secureFtpClient = new SSLFTPClient();
secureFtpClient.setConfigFlags(SSLFTPClient.ConfigFlags.DISABLE_CONTROL_SSL_CLOSURE);
secureFtpClient.setRemoteHost(export._sIp);
secureFtpClient.setRemotePort(export._iPort);
secureFtpClient.getRootCertificateStore().importPEMFile("C:\\cert.pem");
secureFtpClient.loadClientCertificate("C:\\OpenSSL-Win32\\bin\\client_re_full.pem", "lafon");
LogFile.printLog(0, "INFO", "after load cert");
secureFtpClient.connect();
LogFile.printLog(0, "INFO", "after connect");
secureFtpClient.auth(SSLFTPClient.AUTH_TLS);
LogFile.printLog(0, "INFO", "after auth");
secureFtpClient.login(export._sLogin, export._sPassword);
And the execution is freezed on Auth() function ! (so "after auth" never logged)