I upgraded from one version of Amazon MWS (marketplace web service) version
https://mws.amazonservices.com/Orders/2011-01-01
to
https://mws.amazonservices.com/Orders/2013-09-01
and started getting the following error:
The AWS Access Key Id you provided does not exist in our records.
The keys are all correct and double checked.
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Someone at Amazon decided to change the order of parameters for some reason...
IMarketplaceWebServiceOrders service = new MarketplaceWebServiceOrdersClient( applicationName, applicationVersion, accessKeyId, secretAccessKey, config);
to
MarketplaceWebServiceOrders service = new MarketplaceWebServiceOrdersClient( accessKeyId, secretAccessKey, applicationName, applicationVersion, config);
So obviously it compiles but fails.
Just switch them and it will work. Hopefully they didn't switch anything else important like this in the API.