How determine DVB-S2 card?

Hi all, I'm using getstream for more than 3 years, and it's a very stable, light and fast program. Now I change my card to Tevii S464 S2 card, but when I use dvb-s2 { tag in my config file, getstream says the card is dvb-s and this option is not supported. I'm sure the card is S2, and I easily scan S2 frequencies with scan-s2. How getstream determines a card is S or S2? and how could change this behavior. Best regards. A. HMH.