Can't get AC through S2P file component in QUCS with transient sim, how to do it?

I am trying to do simple transient simulation in QUCS.
I loaded s2p component, AC source of 2GHz at port 1, and measure wave at port 2.
Using S-parameters simulation works well, and i can see s21 in smith chart. but when i do transient simulation, there is no any output on port 2. So i can see only input sine, and no any expected output sine... Anybody tried it?

AC simulator may be not supporting s-parameters ?
It's pretty possible..