problem with soundtrack pro v2.0.2 under snow leopard

Hi, I've just upgraded my mac book to snow leopard and now when I try to record something with soundtrack pro v2.0.2 through the line input jack, the internal microphone is still switched on and none of the preferences allow me to switch to the input jack,ks

Does anyone know whether STP v2.0.2 will run ok under snow leopard? If I need to upgrade the drivers, does anyone know where I can find these and how to instal them.

Many thanks.