mfy1981

Is there any solution?

Thanks for reply. I use keyboard which pluged in to use pc. (Using external keybord easier than keyboard on laptop) So when i pluged in casio keyboard, i cant use external keyboard.

I have CTK3400SK too. I can use keyboard as MIDI keyboard. But when i pluged in as MIDI keyboard, my pc keyboard which i use as keyboard on laptop get to be disabled.