Win 7 won't boot without DVD in drive

Installed Win 7 RC 64bit as a stand alone OS on my machine.

When booting, if the DVD is inserted, it will give me the "Press any key to boot from CD/DVD" message, if I wait until that message expires, then the OS boots fine.

If I remove the DVD, then the system does not see either drive as bootable.

Drives are:

C:\ (A0) Intel 64GB X25-E SSD (OS installed here)

D:\ (B0) Maxtor 1TB drive

E:\ (B1) Pioneer CD/DVD burner

Motherboard is EVGA nForce 750i SLI

Probably doesn't matter, but just in case:

CPU: Q8400

RAM: 8GB Corsair 800

GPU: [2] GTX260

PSU: Cooler Master 1000W

I've tried Installing multiple times now, with both drives installed, and also with removing the magnetic drive and installing with only the SSD & DVD in the system. The problem still persists through each installation. I've also tried changing the SATA mode in the BIOS.

Any suggestions ?

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