Problem:

I have a checkbox called quadrant2 and a tab called emotive as follows: 

            //emotive association tab

Tab emotive = controlP5gui.addTab(ctrlwindow, "Emotive Association");

//quadrant 2

quadrant2 = controlP5gui.addCheckBox("quadrant2"/*name*/, 50/*xpos*/, 50/*ypos*/);

quadrant2.setItemsPerRow(2);

quadrant2.setSpacingColumn(60);

quadrant2.setSpacingRow(20);

//quadrant2.moveTo(emotive);

quadrant2.setColorForeground(color(120));

quadrant2.setColorActive(color(255));

quadrant2.setColorLabel(color(255));

quadrant2.addItem("Agressive",0);

quadrant2.addItem("Edgy",1);

quadrant2.addItem("Moody",2);

quadrant2.addItem("Jumpy",3);

quadrant2.addItem("Restless",4);

Note that ctrlwindow is a new window and that works fine. 

However if I uncomment the line: 

//quadrant2.moveTo(emotive);

That is to say, I moved the checkbox to the emotive tab that is part of my floating window ctrlwindow, it doesn't show up. however if I don't move it (aka, i leave the comment), it shows up on the main sketch without a problem. 

Things I've tried:

1. Deleting other tabs in case I reached some kind of limit on the number of tabs
2. added other UI elements such as buttons and sliders to this tab and other tabs as well without a problem
3. successfully added this checkbox to the main sketch, i.e., not the floating window.
4. activated all the checkboxes by default, and deactivated them. 

Question:

Can anyone point me in the right direction as far as getting my checkbox on my floating window. 

Note that I can, however, create buttons, and sliders in this tab without a problem. It is only with checkbox that I'm having a problem. 

Thank you.