The current VZAgent protocol version is 4.0.0. The first thing that you have to do is to update your existing code so that the outgoing XML packets have the correct protocol version. The protocol version is specified using the version
attribute of the packet
element, which is the root element of every VZAgent XML message.
Old version:
<packet version="3.0.3">
New version:
<packet version="4.0.0">