Installing Windows Server 2008 on IBM x3250 M3 Server with EFI

I'm hoping this question hasn't been asked before and I've spent the last 3 hours trying to find a solution to this but to no avail.

Also feel free to edit the tags, I'm fairly new to this site.

I have a bootable Windows Server 2008 DVD that I'm trying to install from on our new IBM x3250 M3 server. I've tested on my laptop that the DVD does indeed boot and it works perfectly.

Usually I can troubleshoot these issues but this EFI system is new to me, I'm used to using BIOS.

So here's what I've tried so far

• Set CD/DVD as the first option in Boot Manager (Primary Boot Sequence). This prompts the message Press any key to boot from CD/DVD… but that fails with the message "Boot Failed. CD/DVD Rom"
• Set the Secondary (WOL) Boot Sequence to CD/DVD Rom. I'm not even sure it gets to this step to be honest, Intel Boot Manager kicks in after failing the Primary Boot Sequence.
• Tried Boot From File(EFISECTOR, …., CD/DVD), selected EFI -> BOOT -> BOOTX64.EFI – A message comes up Press any key to boot from CD/DVD… but that fails too and returns to the previous screen.

I've now run out of ideas and am really keen to get this server up and running. Anyone that has any ideas please share them and I'll give them a crack.

Much appreciated.