Cannot install Fedora Core 15 or 17 Guest on RHEVM 6.3 / RHEVH 3.1 Beta

I've not been able to install either Fedora Core 15 or 17 on my new RHEVManager 6.3 / RHEVH 3.1 Beta setup.

I've successfully installed:

• Ubuntu 12
• Windows 7
• Windows XP
• Centos 6.3

When I start the VM with either of the Fedora Install CDs, it starts booting the CD and then goes to a blank screen.

Any ideas?

VM is defined as 1GB RAM/20GB DISK thin provisioned, SINGLE CPU.

I tried upping to 2GB RAM, made no difference.

Thanks,

James