Your settings look fine from what I can see.
Here is how I have used it in the past:

As mentioned before, please check your Access Key and Secret Key values that you have them mapped to the correct property of the Amazon Token.
If that doesn't work, all I can think is that your Access/Secret key pair does not have access to the bucket on S3.
Thanks for the reply; the token is mapped properly, so still not sure what is wrong.
Could you give an example for the raw value for the Bucket? maybe it is formatting or something else.
Does it make a difference whether there is a SubFolder or NewSubFolder? Maybe certain items can't be the same value?
Also just realized, how does the region get set? it is possible that I am pointing to a different region.