MaaS install 64 bit client nodes doesn't work

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http://askubuntu.com – I have installed a MaaS node that will act as the parent and I am trying to add additional nodes via the PXE boot. The nodes boot fine and get an image from the MaaS server but they only install the 32 bit version. They are 64bit machines and I would really like them to use the 64bit version of Ubuntu Precise. The MaaS server has the precise_x86_64 image according to the maas-import-isos and it is an option when its doing a network boot. However if I do the maas-precise-x86_64 the node doesn't register with the MaaS parent node. It seems like it just installs a clean version of Ubuntu 12.04 64 (HowTos)