The new client will not work with FOG 1.2.
If you want to use the new client, I’d highly recommend you upgrade to trunk.
https://wiki.fogproject.org/wiki/index.php?title=Upgrade_to_trunk
While I do understand hesitation of upgrading to an “development” version, I can assure you this version works with the new client as the new client and FOG where built together with a lot of collaboration between @jbob and myself.