checkbox in grid always gives "false"

All,

We have a checkbox column for a XML based table.

grid.setCellTemplate(new AW.Templates.Checkbox, 0);

table.setValue = function(value, col, row){
    if ( col == 0 ) {
       alert(value+' '+row+' '+value.length);
         }
}
  The alert statement gives "false 0 undefined" always. Have you faced this before? please help.