New Post: Winform Designer Problem

I am a new user to OxyPlot and tried to create an WinForms example in VS2012 Professional. I followed the steps to add OxyPlot to the VS designer toolbox but I get the following error when I add OxyPlot.WindowForms.dll:

There are no components in 'xxx\OxyPlot.WindowsForms.dll' that can be placed on the toolbox.

John