I have a client which is build on stunnel which is failed to talk to a secured server while we can connect to the server with IE as client.

We have both Server certificate and Client Certificate. From looking the log, it appears that the IE also got the same failure in the first step, but it did not give up and tried again with "2 1 0.0470 (0.0470) C>S SSLv2 compatible client hello" and successed. so what did we do wrong here? some extra openssl library need to be built in?