Creating spot color in Illustrator CS4 js

Hi,

I need to create spot color in Illustrator CS4 with js, with assigned name and color values. Here what I have:

myColor = myDoc.spots.add({name:"FOIL", colorValue:[10, 0, 100, 0]});

But it comes out as process instead of spot and the color is not assigned.

Thank you for your help.

Yulia