Hi there,
Thank you for contacting us, your time is greatly appreciated.
What type of file are you trying to upload? Is it a CSV or other? You can download example files and see if they match up with your data here -http://www.wpgmaps.com/documentation/exporting-and-importing-your-markers/
I hope this helps? If you have any further questions please feel free to create or log a ticket or simply reply to this form.
Kind Regards,
Andrew