DR Starting Render -> Not Reponding

[grantwarwick]

Snippet from the log.

[2014/Feb/5|13:15:12] 1 interpolation maps registered
[2014/Feb/5|13:15:12] Rendering interpolation maps with minRate=-1 and maxRate=-1
[2014/Feb/5|13:15:12] Setting up 12 thread(s)
[2014/Feb/5|13:15:33] Render host 192.168.0.162 added

[2014/Feb/5|13:15:34] Scene transferred to rendernode1
[2014/Feb/5|13:15:40] Server 192.168.0.162: Scene loaded; starting render.
[2014/Feb/5|13:16:41] Threads completed
[2014/Feb/5|13:16:41] Calling endPass() on irradiance maps
[2014/Feb/5|13:16:41] Calling prePassDone() on irradiance maps
[2014/Feb/5|13:16:41] Image prepass completed.
[2014/Feb/5|13:16:41] Rendering image.
[2014/Feb/5|13:16:41] Setting up 12 thread(s)
[2014/Feb/5|13:17:33] Server 192.168.0.162: Render completed.
[2014/Feb/5|13:17:33] warning: Render host rendernode1 (192.168.0.162) is not responding
[2014/Feb/5|13:18:08] Render host 192.168.0.162 added

[2014/Feb/5|13:18:09] Scene transferred to rendernode1
[2014/Feb/5|13:18:14] Server 192.168.0.162: Scene loaded; starting render.
[2014/Feb/5|13:19:17] Server 192.168.0.162: Render completed.
[2014/Feb/5|13:19:17] warning: Render host rendernode1 (192.168.0.162) is not responding
[2014/Feb/5|13:19:55] Render host 192.168.0.162 added

[2014/Feb/5|13:19:56] Scene transferred to rendernode1
[2014/Feb/5|13:20:02] Server 192.168.0.162: Scene loaded; starting render.
[2014/Feb/5|13:21:05] Server 192.168.0.162: Render completed.
[2014/Feb/5|13:21:05] warning: Render host rendernode1 (192.168.0.162) is not responding
[2014/Feb/5|13:21:39] Render host 192.168.0.162 added

[2014/Feb/5|13:21:40] Scene transferred to rendernode1
[2014/Feb/5|13:21:45] Server 192.168.0.162: Scene loaded; starting render.
[2014/Feb/5|13:22:49] Server 192.168.0.162: Render completed.
[2014/Feb/5|13:22:49] warning: Render host rendernode1 (192.168.0.162) is not responding

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For the last few days since downgrading from the beta to 2.4 one of our render nodes connects complete fine but then hangs and repeats this process over and over.
I've seen this behavior before and it required a server restart and that was it but this time nothing I have attempted is working

[jacksc02]

Double check that the nodes are looking at a vray license

[svetlozar.draganov]

Along with the license, please check that all machines use the same version of Vray.
Would it be also possible to show us vralog.txt file from the 192.168.0.162 machine ?
Have you also reinstalled or updated Autodesk products like Max or BackBurner ?