[Snapshot Pro] Help with Snapshot

I'm having trouble getting Snapshot to upload backups created with Snapshot to my Amazon server.

I've set up the connection to Amazon, and it tested fine. When I try to set Snapshot to create a backup and upload it to Amazon, the backup file does not upload. The remote folder is created, and the 39KB "test" file goes up fine. But the archive of the actual backup does not go to Amazon. The backup is not very large- less than 250MB.

Thanks for any assistance you can provide.