My copy worksheet function doesn't work
 

I've been using excel for quite a while and all of a sudden my copy worksheet
function doesn't work.
I right-click on the tab - select copy worksheet - select a new document hit
the copy button and.. Normally, at this point I would have the sheets I
copied in a new worksheet but.. nothing. It's like the page refreshes but
won't move the sheets.
Is my program defective? Is there a way to fix this?