Oracle VirtualBox Guest Additions installation help

Good day
I recently attempted to to install Vbox Guest additions on CentOS 7.(Running on Windows 7 )
The packages downloaded fine .
However when attempting to run the installer on CentOS 7 for vboxadditions_5.1.28_117968 , I received an error message written to
/var/log/VBoxGuestAdditions.log .
I checked out the error from the log and it is complaining about the path to the Kernel .
I have attached a screen clipping taken from my Vbox for additional info

Many THANKS :confused: