Trouble with ‘Kubrick Theme’

I don’t seem to be able to change the header image.
I changed two lines of code to direct them to my image.
I changed header template under my WordPress admin.

header { background: url(“https://abnershow.com/wp-content/themes/abner-show/images/ASpersonalheader.jpg” no-repeat bottom center; }

headerimg
{ background: url(‘https://abnershow.com/wp-content/themes/abner-show/images/ASpersonalheader.jpg’) no-repeat top;}

Yet it doesn’t seem to upload my image.
Here is my url: https://www.abnershow.com
Please Help …:O)

Abner