Amazon S3 and login will not work

I have used all information to login into Amazon S3 Buckets like:
Access Key ID and Secret Access Key under instructions:
https://www.smartftp.com/support/kb/how ... f2665.html
 
Issues is that there is an error inside Amazon bucket:
[14:21:35] SmartFTP v5.0.1354.0
[14:21:35] List buckets.
[14:21:36] HTTP protocol error. 403 Forbidden
[14:21:36] List buckets.
[14:21:37] HTTP protocol error. 403 Forbidden
 
 
Why is this nd how to solve this.
I have defined all settings
http://docs.aws.amazon.com/gettingstart ... ucket.html
 
I'm new to this and need help what is wrong?
 
How to see images inside bucket also at website and Smart FTP?

Please install the latest version 6:
https://www.smartftp.com/download