I have a problem with M-AUDIO Fast Track C400, CUBASE 5 and Windows 7. When I make some long songs (a lot of opened tracks/instruments and notes/cubes), Cubase suddenly stops working and Fast Track driver is automatically changed for ASIO driver Full Duplex. Then I take off ASIO driver and set Fast Track driver again but no way to open those songs again. Cubase stops to working and Fast Track driver has automatically changed for ASIO driver Full Duplex again. Thanks for the help, Rudo.