how to decrypt http over sslv3 (https) rsa NON diffie helman with a valid client auth cert

I have a valid sslv3 client authentication cert. that I use to access a company's web-site. The transaction works fine in a standard web browser. I would like to decrypt the ssl session (the server to client application data specifically). Maybe it is simply my ignorance, but shouldn't this be possible? I believe the client to server app data is encrypted with their public cert, so I am not sure if is this is accessible intra-wireshark, but I would minimally like to get the responses decrypted.

This transaction is completely captured in wireshark (no reused/resumed ssl sessions). It is not a DH exchange. (1) I have tried using the .pfx file format which is how the cert was delivered to me.
(2) I have tried converting to PEM and just including the unencrypted client private rsa key using openssl. (3) I have tried converting to PEM and including the unencrypted rsa priv. client key + the client and server certs. (4) I have tried converting to PEM and including the unencrypted rsa priv. client key + the client cert.

openssl version >1.0, and w.s. version 1.6.2 w/GnuTLS. Debug log for all includes a "ssl init private key file X successfully loaded". In case (1), The cert imports are interesting. "NameOnCert (Error), KeyID (number)". But in all cases: can't decrypt pre-master secret. no decoders available both client and server packets.

I think I am hitting something fundamental -- any insight would be greatly appreciated. Thanks Chris