Linux – Genymotion Error: Unable to load Virtualbox engine

I am on Arch using VirtualBox from community repo and Genymotion from AUR.
Whenever i want to start a virtual device it says:

Unable to load VirtualBox engine.

Make sure that it is properly installed before starting Genymotion.

For more information please refer to:
https://cloud.genymotion.com/page/faq/#vbox

I've already reinstalled everything nothing seems to work.

When i use

#vboxreload

"vboxnetadp vboxnetflt vboxpci vboxdrv" are loaded and genymotion works for this session until i reboot the system.

I use a virtualbox.conf at /etc/modules-load.d/ to load "vboxnetadp vboxnetflt vboxpci vboxdrv".

$cat /etc/modules-load.d/virtualbox.conf 
vboxdrv\nvboxnetflt\nvboxnetadp\nvboxpci

I'm not a linux crack but I thought /etc/modules-load.d/virtualbox.conf would automatically load the modules – so i do not need to use #vboxreload after each reboot?