Audiogram 3 Set Up

When I connect my Audiogram 3 to my computer, I can hook up any instrument/mic and it goes through to the speakers I have, meaning my computer picks it up. However, when I open Device Setup in Cubase 5 the USB Audio CODEC inputs are inactive while the outputs are active. Audiogram 3 doesn’t have any switches or anything so I don’t know how to fix this. I’ve already downloaded Yamaha drivers so the latency was reduced, but the inputs are still inactive. Any ideas as to what I could’ve messed up?