Connect two UR22 simultaneously to one PC


I have been using UR22 for two years and was happy with it. I need another interface to work with my Digital PIano so I bought another UR22 and connect them to two different USB ports of the same PC. The Yamaha Steinberg USB Driver can see two UR22s and configure playback sample rate of each of them, the ASIO buffer size setting affects both and each of them can’t have its own setting. Foobar can see two UR22s and switch output between them, but when using ASIO, only one interface is found and I can’t use them in two DAW simultaneously. How to solve this?