Problem with cryptDestroySession in the server

I'm using SSH for the communication between a client (sending data continuously) and a server (receiving data)

If at any time of communication the client calls cryptDestroySession the server's function cryptPopData returned CRYPT_ERROR_COMPLETE. This is good.

But if the server calls cryptDestroySession the client function cryptPushData does not return any errors and continues sending data, while the server's session is destroyed.

How can I detect de server destroy session?

Regards