VirtualBox import error Cannot register the DVD image

I solved it by open the file win 7 64.vbox with text editor and remove the tag:

<DVDImages>
   <Image uuid="{fd686a98-c1a6-42d9-82aa-67728b524d53}" location="C:/Program Files/Oracle/VirtualBox/VBoxGuestAdditions.iso"/>
</DVDImages>

Know that by removing the tag it will be added as empty tag.
and reopent the vm of virtual box again. and it worked