Installing ESXi onto a HP ProDesk 400 G4

Hi helpers, as above I am trying to install ESXi 6.0 update2 onto a brand new HP ProDesk 400 G4 , from the BIOS I disabled the TPM chip and secure boot but I cannot get the PC to boot using the CD-Rom, I have tested the CD and it works fine on another machine.

Any advise ??

Thanks in advance