Key Editor: Only one note plays

Cubase
1

In the key editor I have manually entered a variety of notes, but for some reason only one of the notes plays. That note is colored red while all the others are colored white.

What is going on here? How do I get all of the notes to play?

Cubase Elements 8
Windows 8

2

Hi,

These white notes are:
a) Out of MIDI part range.
b) Muted.

Btw: If I’m wrong, what Color settings do you use in your Key Editor? Could you send a screenshot, please?