MM17 is now a very old version (the latest is version 30) so I suspect you have bought this from a previous owner. Is that correct? If so, you need to ask him to tell Magix that he no longer owns the product and his registration of it should be cancelled.
This page explains fully what the error code -24 means and how to go about correcting it.
I have hidden your post as it is a different issue to the OP's.
Please create a new topic when the issue you are having is different from the topic under discussion and do not duplicate posts that have already been answered