PT880-Neo, Won't run in Dual, only Single mode

I have two 512 pairs of RAM (DDRAM 512M|PC-3200 991093 MUSHKIN R) that won't show up in CPU-Z or the POST message as running in Dual mode. It'll only show in single mode. I've tried every combination of slots (i.e. 1 & 3, 2 & 4, etc, etc) to no avail. I've also tried adjusting the BIOS to specify dual channel as well as letting it "auto" adjust. I've tried changing the RAM ratio's 1:1, 5:4, etc with all of the above combinations. Any suggestions would be appreciated....
PS. Bought the board two weeks ago. Haven't checked to see if there is a BIOS update. Don't see that as a reason it won't work since it ships as a Dual DDR 3200 compatible board.
My rig:
PT880-Neo LSR
Intel 2.4A Prescott (stock fan/heatsink)
2 Mushkin 512 DDR PC3200
ATI Radeon 9800 Pro
WD 74G 10k Raptor SATA 8mb
Hitachi 160GB SATA 8mb
Creative Audigy 2 ZS
Antec True430 430W PSU (+5V@36A, +3.3V@28A, +12V@20A, [email protected], -12V@1A, +5VSB@2A)
Large Server Case (6 fans)
18.1" Gateway LCD
Logitech Z-680, 500W 5.1

During bootup, did you see "Dual Channel Liner Mode" or "Single Channel Virtual Mode" on the bootup screen?

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MSI PT880 Neo-FSR http://global.msi.com.tw/index.php?func=proddesc&maincat_no=1&cat2_no=&cat3_no=&prod_no=608
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P.S. I tried to do my best with my 'rusty' English, so I hope you could fully understad what I've written above.

Quote from: Henry on 03-September-08, 14:26:24
Are you saying it does work but you simply can't boot from it? Have you tried by using the F11 boot menu?
Yes! This device has been working great, but the only problem I get is when I try to use it for booting.
I alredy tried using the F11 boot menu and nothing happened... It's so weird!

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