FUSION : issue with DeltaKeyer and Cleanplate

Hello,
I am just starting with Fusion for a green screen shooting.
I really don't understand why but after using "CleanPlate" nothing happen when i connect "CleanPlate" to "DeltaKeyer" by the "CleanPlate" link but only by the "GarbageMatte" link. BUT it is not creating a "Matte" in the Deltakeyer so i can't modify or adjusting it...

Does someone know why nothing happen when i connect "CleanPlate" to "DeltaKeyer" by the "CleanPlate" link ?

Thank you for your answers...

Clément

I just have an other problem maybe someone can answer me please : when i jump to color or render page after fusion the presets i did in fusion change to a strange version. How to save or render or export video made in fusion exactly as it is in fusion ?
thanks