Displaying colorPerVertex in custom MPxShape

[user_deleted]

I created a custom shape node based on apiMesh devkit example (deriving MPxShape and MPxShapeUI classes).
I'm having problem drawing per vertex colors. Adding glColor3f() call just before glVertex() works only in wireframe. Is there anything else I should do ?

[user_deleted]

SOLVED
I missed glEnable(GL_COLOR_MATERIAL);