Amazon S3 downloads - anyone seen this erro

[LeahBS]

Hi there
I'm configuring a new membership site and testing a download to be stored in Amazon S3

party for security but mainly for optimization

the error message is showing whether is choose downloads using the 'link' or s3Flowshield plugin


This XML file does not appear to have any style information associated with it. The document tree is shown below.
<Error><Code>AccessDenied</Code><Message>Access Denied</Message><RequestId>7F5A11F....</RequestId><HostId>OvetB6SzYuDW3CI4dXI3gSoIzohw10dl OPE4cgSLoKQB6FM....</HostId></Error>

I've done everything according to any training I've found so am now stuck

Thanks