Thanks for explanation.
All the above is supposed to help get 64-Bit VM's running on the nested ESXi hosts, I am even having a few problems running 32-Bit VM's.
When I inistitally power on a VM on ESXi-1 the VM & the host momentarily become disconncted in the VI client, they eventually return.
I can then vMotion from ESXi-1 to ESXi-2 successfully but when I try the other way I get this error 'An error occurred whilst communicating with the remote host' ESXi-1 then states (Not responding) in the VI client.
Any idea what's happening here?
Thanks