BIOS setting for "Boot from CD"

This is kind of a follow-up to "Spontaneous Shutdown/Reboot", but a
different subject; hence the new subject line.

After still having the reboots about every week to 10 days, and swapping out
everything except the MB and APU, I decided to try a new MB.

I bought a BioStar A68MD Pro
http://www.biostar.com.tw/app/en/mb/introduction.php?S_ID=830#download,
and separately an AMD Athlon(tm) X4 845 Quad Core Processor, 3500 Mhz CPU. I
know it's kind of out-dated AFA computers go, but it was within my budget,
and had all the necessities for me.

It runs very well, considerably faster than the old Lenovo board, and has
had no shutdowns or reboots on its own. The only real complaint is that I
can't get it to boot from the CD drive if I put a bootable CD in. It just
skips over it and boots right into Windows, albeit a tad slower than if
there was nothing in the drive. About the only time I need this is when I do
my disk images- I boot from my ATI cd and image my drives from there instead
of installing ATI. Just seems a bit quicker that way (for me anyhow).

In BIOS (latest available version), I have the Boot Options menu
http://tinypic.com/m/jtuj5w/3. Under Boot Option Priorities, I have it set
this way http://tinypic.com/m/jtuj5x/3 with "Windows Boot Manager (SATA1)"
first, then the CD drive, and then the HDD where the boot manager resides.
Under the CD drive priorities http://tinypic.com/m/jtuj5z/3 I have my
drives set up the way I use them (although changing this order makes no
difference to my problem).
Under the HDD priorities http://tinypic.com/m/jtuj60/3, I have my boot
drive first and the other drive second (although there's no OS on it, it
still shows in the list, of course).

What I have tried is
A) 1. CD Drive
2. WBM
3. HDD0

B) 1. CD Drive
2. HDD0
3. WBM

C) 1. HDD0
2. CD Drive
3. WBM

"A" skips the CD and boots into Windows; "B" will boot from a CD, but not if
one is not present; and "C" gives a "No bootable device found. Insert
bootable media . . ." error message, with or without a CD in the drive.

If anyone has run into this and has a solution for me, I would certainly
appreciate some help :-)
TIA!
--

SC Tom