hyper link to another file
 

I have a hyper link in cell b4 in worksheet 1 which links to another file.
How can I link that hyperlink to cell b4 in worksheet 2 so that when I update
the hyper link in worksheet 1 b4 it updates my link on in cell b4 in
worksheet 2. In worksheet 2 cell b4 I put ='worksheet 1'!b4 but this does not
create a hyperlink. How do you link the cells and maintain the hyperlink.
Thanks!

David