Servers must always be at the same level or newer than clients.
There's a compatibility matrix for 4.0.4 here:
http://pic.dhe.ibm.com/infocenter/clmhelp/v4r0m4/topic/com.ibm.jazz.install.doc/topics/c_n-1.html
I hope that helps,
John
Norman Dignard selected this answer as the correct answer
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