I was able to help Globeul out getting AutoIt to buy stuff from the TP. The moral of the story is to make sure your post data and Content-Length are correct. Also, if you're doing a buy (from sellers) you have to have the correct price at the time of the request or nothing will happen. For items that fluctuate fairly fast (green wood log -> 9-10c and back over and over), this can look like your request is failing.