Canoli: You use a linksys router which will have a nat feature that will block out a lot of incoming requests. Please tell us your linksys model no. & I can help you thru forwarding a port to allow LW access. Whilst it may have worked for you before, chances are not as efficiently as it should. As to why it suddenly stopped, well ... let's fix the port for your router 1st.

tahoe147: Most routers use NAT which is a type of firewall in that it limits access. Can you provide us your brand & model no. of your device. You may also need to forward a port for LW. Again, if your router does have nat, then although you could use LW before, probably not as efficiently as could be. Let's fix things up with the router 1st.

If you both still have problems after fixing up the router, & your firewalls are allowing LW access, then it's probably an SP2 problem.