create a phonecall with custom filed

I tried to create a phonecall with custom filed in java using netsuite web service 2013_2 version. But it’s throwing error while inserting record.  what mistake I did. Below is my code

PhoneCall phoneCall = new PhoneCall();                
                     List<CustomFieldRef> oCustomFieldRefList = new ArrayList<CustomFieldRef>();
                     StringCustomFieldRef strCF = new StringCustomFieldRef();
                     strCF.setScriptId("custeventcustomcallattempt");
                     strCF.setValue("234");    
                     oCustomFieldRefList.add(strCF);                
                     phoneCall.setCustomFieldList((CustomFieldRef[])
                                  oCustomFieldRefList.toArray());  
                     RecordRef[] recordRefList = new RecordRef[]{new RecordRef("1",recordID,"",RecordType.customer)};                    
                     phoneCall.setStatus(PhoneCallStatus._scheduled);      
                     //phoneCall.setOwner(recordRefList[0]);
                     phoneCall.setMessage("Test-CustomFiledTest1");        
                     phoneCall.setTitle("Test-CustomFiledTest1");
                                 
                     WriteResponse response = null;
                     response = _port.add(phoneCall);
                     System.out.println(response.getStatus()[0].getMessage());