Cannot CreateObject AcroExch

Hey, 

I have a similar question that  was asked before but it could not really give me an answer. 

On my computer I have the Acrobat Reader DC. In a vba project I wold like to create an object of this application by

"CreateObject ("AcroExch.App")" (or "AcroReader.App") 

But this always gives me an error. (ActiveX component cant create object)

What am I doing wrong ?

I would be very happy for an answer

Many Thanks in advance

Jonny