[vtkusers] multiple vtkScalars in one dataset use lookuptable problem?

[g00dioa g00dioa]

Hi,all
I use a dataset with multiple vtkScalars example "pressure" "density" or
others.
now I want to show color map which i select to show.but it always show the
first scalars.

i try to use

mapper.SetScalarRange(dataset.GetPointData
().GetScalars("density").GetRange());

but it dosn't work.the range set to "density" but the color also show
"pressure".

Thanks in advance
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