Due to the way Messenger receives files, any problem receiving files is most likely on the
side of the person sending (when you receive, you connect to your contact and download the
file). This is probably due to either the contact sending having a firewall that isn't allow
Messenger to connect to the correct ports, or not using a router with support for Messenger
file transfer, or an UPnP enabled router and MSN Messenger 5/6.