I ran into an interesting problem the other day with a customer that was having problems with yahoo games. She was getting the following error when she tried to access the literati game:

Unable to connect to server.
One of four things could have caused this;
1. You are behind a firewall.
2. You are not connected to the internet.
3. The game server is down.
4. You have a stale page in your cache.

The problem was caused by their linksys router.  Apparently the wireless router started blocking the ports to the game server. I pushed the reset button at the back of the computer and the router rebooted. After that everything worked fine. 

To be fair, first I isolated the problem to the router by first bypassing the router altogether and connecting the computer directly to broadband/DSL/Cable modem.

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