Red Hat 6.0 not recognized

[falves1]

I am trying to deploy Red Hat 64 using this ISO
rhel-server-6.2-x86_64-boot.iso
and the appliance says it does not recognize the format. However, I can mount the iso and boot from it as well. This a KVM machine, so I have the iso in the host and attach it the virtual machine as CDROM.
Any ideas?