adobe reader control kills key events

I am using visual studio express 2013 on Win7 professional (x64) to write a private c# form application.

Adobe reader is installed and added to my project.

The control shows a pdf, wounderful.

But at the moment, my form has the adobe reader control, no key events where triggered.

Without the control: all works fine.

I record a video to show my problem: https://www.youtube.com/watch?v=V0Vo2p2jz9M

Is there a solution or workaround to give the key events to my form?

Are more information needed?

Thanks a lot.