We are attempting to write an attribute customization calculated value script to clear the story points of a Story when the Story moves to the Invalid state.  I am able to do something similar with the time spent field so I thought I could do it with Story Points.  I have written the script included below and have set it as the calculated value script for the Story Points attribute of the Story work item along wiht a Dependency on the Status field.  When I use it, I don't get any error but I also don't see the Story Points field change.  The id of the '0 pts' story point value is "0" and that is what I am returning.

/***********
 *
 ***********/
dojo.provide("com.gdms.rtc.ValueProvider.ClearInvalidStoryPoints");
(function() {
    var scriptName= "ClearInvalidStoryPoints";
dojo.declare("com.gdms.rtc.ValueProvider.ClearInvalidStoryPoints", null, {
        getValue: function(attribute, workItem, configuration) {
            var stryPts = workItem.getValue("com.ibm.team.apt.attribute.complexity");
            var state = workItem.getValue("com.ibm.team.workitem.attribute.state");
            var rtype = workItem.getValue("com.ibm.team.workitem.attribute.workitemtype");
          
            / Check to see if the type/state pairing is one we care about /
            /  Story ==> Invalid (.s2) */
            if ((rtype.lastIndexOf("story") > -1) && (state.lastIndexOf("s2") > -1)) {
                stryPts = "0";
            }
          
          return stryPts;
        }
  });
})();