is my sli working correctly

I am unsure wether my sli is working properly. I am running 2 9800gtx and under NVIDIA control panel sli is enabled but when i run 3dmark06 it only picks up 1 gpu, same as when i run riva tuner and msi dual core centre. are these programs supposed to detect multiple gpus or is it normal for them to only show it as single gpu?
 
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