get custom list issue

I'm trying to get the contents of a custom list, and found another thread that offered C# code to do just that, which I used to write the code below: (original post and code) https://usergroup.netsuite.com/users/showpost.php?p=94414&postcount=8
my code:

protected void getNetSuiteList(string listId, out string statusDetail)      {          statusDetail = "";          if (NetSuite.misc.Login())          {              RecordRef recRef = new RecordRef();              recRef.internalId = listId;              recRef.type = RecordType.customList;              recRef.typeSpecified = true;                ReadResponse response = NetSuite.misc._service.get(recRef);                if (response.status.isSuccess)              {                  CustomList list = (CustomList)response.record;                  foreach (CustomListCustomValue listValue in list.customValueList.customValue)                  {                      Response.Write(listValue.valueId.ToString() + "=" + listValue.value);                  }              }              else              {                  statusDetail = response.status.statusDetail[0].message;                  Response.Write(statusDetail);              }          }      }