You can check by signing in here
your mouse over My Account/Console at the top of the page, and click on
“Security Credentials” After signing in, click on “Continue to Security
Credentials” to see the keys listed select “Access Keys (Access Key ID
and Secret Access Key)”. If your access keys are no longer active you
can reactive them if necessary. If you have a new set of access keys you
may need to update your application to use the active set.
In addition, you may also be able to find assistance through the AWS developer forums