How to use Smart Card Manager?

Hello.

Can anybody tell me how to use a SSL certificate and make it active on a xrdp server?

I generate a .pem file and imported in Smart Card Manager, after restart the imported certificate is gone, why this is happening.

I know that I don`t use this certificate in the good way that why I write here maybe some one give me some clues how to make this x509 certificates to be active on the server.

Thank you very much.
Best regards
Chris.