Hello folks, I've been to test the boost asio ssl socket example: http://www.boost.org/doc/libs/1_43_0/doc/html/boost_asio/example/ssl/server.... The code is copy & paste. The program compiled without problems, if I start the program I became an exception: ### snip ### Exception: Invalid argument ### snap ### While I'm debugging the program I find out the error throws in the following lines... ### snip ### context_.set_options( boost::asio::ssl::context::default_workarounds | boost::asio::ssl::context::no_sslv2 | boost::asio::ssl::context::single_dh_use); context_.set_password_callback(boost::bind(&server::get_password, this)); context_.use_certificate_chain_file("ca_cert.pem"); context_.use_private_key_file("ca_cert.pem", boost::asio::ssl::context::pem); context_.use_tmp_dh_file("dh512.pem"); ### snap ### I can't locate the error exactly, could it be I've created my certificates with wrong steps? Here is the code, I've created my certificates. Root Certificate ### snip ### openssl req -new -x509 -keyout ssl_priv.pem -out ca_cert.pem -days 3650 ### snap ### Diffie-Hellmann ### snip ### openssl dhparam -out dh1024.pem 512 ### snap ### I've linked the required boost libraries and the OpenSSL Library... Whats going wrong, can everyone help me? Thanks. so long jd