Black screen in screen sharing in meeting

[stolowy]

I am a user of Teamviewer 11.0.53254, with the free license.

My OS is Windows 7.

I have no problem to share my screen with the remote control function. I give my ID and password to my contact and he sees my screen.

However, when I go to Meeting/Presentation, I get my control panel on the right. In the section "Screen sharing", I see that the screen is black. When I click on Invite, send an e-mail to my friend to invite him and when he connects to the meeting, he also sees a black screen.

I must add that when my friend and I inverse the roles (my friends invites me for a meeting), I see his screen with no problem.

I thank you in advance for your help.