Tetsuro Shiozaki

Thank you guys for your comments. I just forgot to mention one thing. Actually, Cakewalk can detect the two midi keyboards.What I did is: 1. Start up Cakewalk. 2. The error message pops up. 3. I go to "Edit > Preferences > Devices". 4. Check the 2nd keyboard (see pic). With this I can play the two keyboards with no problem. But the problem is I got the message every time I start up Cakewalk and I have to check the 2nd keyboard.

Thanks for your comment. I tried MIDI-OX. It's hard to understand. I think Windows detect the two keyboards as identical ?

No it wasn't. Just to make sure, I started Cakewalk without Chrom opened. I got the same error message.

I connected two MIDI keyboards (M-Audio Keystation61 MK3), and found the error message when I started up Cakewalk. Could somebody help me to solve this error?