Autodesk AutoCAD 2014 Allied product is not found

Hi there,
I have downloaded a Language Pack for AutoCAD 2014 from the official website and I have this error when I want to install it. My program Autodesk AutoCAD 2014 is original and licensed and I don’t know why the product is not found. Can anyone help me please ? What should I do ?
Thanks !

Autodesk AutoCAD 2014
Allied product is not found.
