I've spent way too much time getting this to work - need some paid expertise.

I'm downloading orders from Amazon MWS just fine, but I'm having real trouble uploading an XML feed. I've got the signatures working (they match the sandbox values exactly) but posting from my app results in a signature mismatch error.

I suspect I'm not attaching the xml feed content to the http request properly. I'm using Rick's HTTP tools and Chilkat for encryption.

Doh! - looks like I was simply using the wrong URL to post the feed...

Odd that the error message steered me elsewhere...

Like most problems I have - best solution is to post a cry for help, then work on it another half hour to find the solution...