Cannot get setId to work on checkboxes

I am evaluating ActiveWidgets 2.0.1 prior to purchase. I am new to these APIs.

I have achieved the grid with fixed columns and two fixed header rows and have acheived almost everthing we need.

I need to set a unique id attribute for certain checkboxes in a grid. I can set the name and value attributes using the following code:

var obj1 = new AW.Templates.Checkbox
obj1.setAttribute("name","987654");
obj1.setAttribute("value","GIF");
obj.setCellTemplate(obj1, 3, 3);


However, I cannot set our unique id using the following code:

obj1.setId("555_666");

All I see for this cell is id=aw51-cell-3-3

What am I missing?

Thanks in anticipation.