How to Enable Dual Channel?

Hi,
I have an MSI K8N Neo Plat, with a Newcastle 3200+ cpu, and two sticks of Kingstone DDR-SDRAM PC3500 - 256Mb.
Anyway, according to CPU-Z the memory is running in single channel mode...
Is there any way to get it to run dual channel?
I've tried it in slots 1&2, 1&3 and 2&3, but all report single channel.
The CPU and board are not overclocked in any way, and it is running stable and has no other issues (aside from the incorrectly reported CPU temperature).
Thanks for you help...

Ok, I'm probably just getting DDR and Dual Channel mixed up
So, on bootup it reports...
DDR400 Memory Clock : 200Mhz
TCL:2 Trcd:3 Tras:8 Trp:3 (1T Timing)
Which is what should be expected for this kind of ram on this board?
(I know 1T and TCL:2 are both good values, I presume the DDR memory clock at 200 gives a 400Mhz throughput?)
Also If I were to add a 512Mb stick into this would it still run at DDR400?
Thanks....

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This Settings I found on Microsoft Site.
Click Start, and then click Internet Explorer.
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can any one tell me how to connect the RAM as dual channel on the MSI 865PE Neo-2 p Platinum Edition ?
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Franknputer is right.
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hope this information will help you...
http://www.intel.com/support/motherboards/desktop/sb/cs-011965.htm?switch=tw#flex
quoted from Intel website above:
Rules to enable dual-channel mode
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Quote
I get "Dual Channel Liner Mode" during start up. What is "Liner Mode" and is it something that can be changed?
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