To use ClickToFront, not only do you have to double click the window to bring it to the front, but you also have to hold in Left Alt on the keyboard at the same time.
I use MultiCX instead for my ClickToFront feature. It's better as it does what it says on the tin... it double clicks windows to front, and doesn't require a key combination.
You don't have to hold left alt, just double click on the window and it will come to the front. Just check the tooltypes of ClickToFront.
