Visual Studio 2013 Control Toolbox

Hi,

I have a project which contains many UserControls , some are created by Adding New Item ->User Control(1) in the Solution,

some are created by Inheriting from other controls(2).

I can see in the Controls Toolbox all User Controls that belong to (1) but not these that belong to (2). In Visual Studio 2012 I could see all of them?? Is there any option that I have to set up??

Thanks in advance!