CI1 + Yamaha MX61 = trouble?


I’m having a bit of trouble with my setup, so I hope someone here can help. First, this is what I have:

PC with Windows 7, 12gb ram, Intel i7-3770K @ 3.50GHz
Cubase 8 Pro
Steinberg CI1
Yamaha MX61 synth
Yamaha P-105 digital piano
Denon Home Cinema 7.2 receiver

So, both the MX and the P-105 is connected to the PC via USB, so that I can use both of them for midi in Cubase. Sound goes through the CI1 and into the Denon Receiver. This all makes for lovely sound. However, the problem seems to be that when using the CI1, I the PC can’t find the MX61 at all. I can use one of them, not both…

Anyone know what I’m doing wrong here? :stuck_out_tongue: