Thanks to our customers, we have discovered a little issue in ARP in current EMX (Embedded Master) firmware.
This is the firmware that need to be loaded to fix the issue.
Keep on using the same libraries and TinyBooter from SDK. You only need to load these files (after unzipping them) using MFDeploy.
http://www.ghielectronics.com/downloads/NETMF/EMXv4.0.2.1.zip