Error: Could not load SSL library

Hello everybody

I wish that someone here can help us.

We are developing software based on WebSockets.

We already generate the necessary certificate and keys to enable the SSL over the WebSocket HTTPServer, and everything is working fine on my local machine.
When we deployed the server application on the Windows server machine, we got the following error

"Could not load SSL library",

even though open SSL is already installed and libeay32.dll,ssleay32.dll are already existing in the application path

Thanks