TRY CATCH not working

Hi All,

I am trying to add spot color in illustrator using javascript, TRY CATCH is not woking, it is adding again and again same color value with name of "spot color 1" and "spot color 2" ...

can any one help for this

try {

var myDoc = app.activeDocument;

var spotName = "FINISHING";

var spot = myDoc.spots.add();

// Create CMYKColor

var cmykColor = new CMYKColor();

cmykColor.cyan = 0;

cmykColor.magenta = 100;

cmykColor.yellow = 0;

cmykColor.black = 0;

// Create Spot

spot.color = cmykColor;

spot.colorType = ColorModel.SPOT;

spot.name = spotName;

} catch (e){}

Thanks in advance

simon