Hi falldeaf,
A couple of items for you to investigate.
First if you set the setDebugLogging method it could provide additional insight.
Are you seeing in your debugging a hit being sent? If so, but you are not seeing data, is the reportsuite Timestamp enabled or not?
It may be that your reportsuite is not Timestamp enabled and you are sending Timestamped hits, in the json file, is offlineEnabled true?
For further assistance, please contact Client Care (link below) so we can learn more about your specific requirements and design a solution for your use case
Enterprise Support
Jen