IIS 7.5 and POST

I have a device that will regularly transmit a small log file from my network via HTTP/POST to a GoDaddy hosted Windows 2012 web server. This is an anonymous file transfer (no credentials). When I make the attempt to transmit from the device I get a response below, which I've truncated:
    1/xmlupload: ReadUploadResult: Begin reading data from remote server.
    1/xmlupload: ReadUploadResult: Finished reading data from remote server.
    Status: HTTP/1.1 400 Bad Request (Received 13 lines.)
    ERROR: Channel 1's Uploader failed to contact "http://22.56.82.102" because of a communications problem.

I am not familiar with how to enable IIS 7.5 to allow POST so this device can regularly drop log files to the server. I'm not even sure whether this is a POST configuration issue. Can anyone provide some guidance on this?

Here is the detail of the device and its data transfer specifics: http://www.obvius.com/sites/uat.obvius.com/files/TN24-DataCollection.pdf