I am trying to install the ZCM Agent on a Windows XP fresh install, I keep getting the error:

Unexpected server result. Server code: -34. Server message Invalid Device Authentication Information.

In the server logs:

[DEBUG] [11/3/09 9:34:10 AM] [] [Registration Web Service] [] [registerDevice complete, time: 3ms, code: -34, device: e5682406762e1d573309c3b71720c2b1, thread: 46] [] []

Any idea what this server code is? Or more importantly how to fix it? I have tried weeding through documentation only to come up empty handed.

Thanks for any help.