Searching for Phone Calls

Hello,

I am having a heck of a time getting this to work and I think I am missing something very simple.  I need a script to run on customer save (client-side) to check if they have any scheduled phone calls and set a custom checkbox depending on the results.

The code:

 customerNumber = nlapiGetRecordId();   var filters = new Array();   filters[0] = new nlobjSearchFilter('company', null, 'anyOf', customerNumber, null);   filters[1] = new nlobjSearchFilter('status',null,'is','2',null);      var columns = new Array();   columns[0] = new nlobjSearchColumn('startdate');      var callresults = nlapiSearchRecord('phonecall',null,filters,columns);   if (callresults != null) {    nlapiSetFieldValue('custentity_schedcallback','T');   } else {    nlapiSetFieldValue('custentity_schedcallback','F');   }