pasting links into list, option not available
 

I have an .xls (2003) file that has a list defined in it. I want to
paste a link from another .xls file into a cell within that list, but
the "Paste Link" option under edit-paste special is greyed out and
not available. If I move outside of the list, it is available. Is
there a way to paste a link into a list? If not, can anyone explain
the rationale for the restriction?

Thanks in advance.