Remove an item

I wouldl like to remove an item from the legend of a plot.
I tried

Code:

---

dDailyValues = new QwtPlotCurve("");
....
QwtLegend* legend = new QwtLegend(this);
        legend->remove(dDailyValues);
insertLegend(legend,QwtPlot::BottomLegend);

---

But I still see the symbols for dDailyValues (a line) in the legend
Why?

dDailyValues->setItemAttribute(QwtPlotItem::Legend, false);

Uwe