Color separation not work well Coreldraw x7

The color separation in Coreldraw x7 using Channel Mixer malfunctions.
The same operation in Coreldraw x6 works perfectly.
I set no color conversion color management setting, the same way as in x6 but the problem is only in x7.
A circle with magenta yellow and black. When i set magenta in mixer color magenta disappears. This is a mistake.
Black show, and yellow show.
Example
Tks for help.