Where do you want a Tooltip? There isn't an example in the code of where you've tried this. If you are wanting it to be in the PlotLabel where you indicate then replace the PlotLabel expression by
Tooltip[Style["Test with Tooltip", "Title", 12], "This is a tooltip"]
Also there's a bug in the notebook you posted. Replace
Otherwise the bottom two sliders do not work.
Let me know if these are the things you are asking. If not, let me know as well ;-)