Sharing folders problem

My daughter can place a file into my sharing folder on her computer and
everything goes through without a problem on her side. When I start WLM on
my computer, the dialog box on my computer shows that it is synchronizing
with her computer. It keeps saying that it is synchronizing, but never
stops synchronizing and never populates the folder at my end. Is there
anything I can check or do to make the transaction come to an acceptable
conclusion? We both have Vista computers with the latest Live Messenger
installed. Thanks for your help.