DR Server rendering on machine with newer version of max?

Forgive me if this is in the help files but i cant find it. Can you use a pc with a newer version of max as a render node? DRServer is recieving the discovery ping but it isnt replying. Any ideas?
Thanks
Jack

It is best to use the same versions of:
-Max
-Corona
-DrServer
-BACKBURNER
on all of the PCs taking part in DR. Otherwise bad things may happen.

Ok ill make sure i do in the future.
Thanks
Jack