Are you doing the following?
- Set the router to use the static IP
- Connect the computer to the router via a CAT5 cable
- Set the computer to automatically get an IP address rather than assigning one manually
- Turn everything off
- Power on the modem, then the router, and then the computer
I'm guessing that you are still leaving the manual IP setting on your network connection configuration which is the main source of your woes.
In figuring out network issues, start simple and then get more complex. First confirm that your computer can connect directly through the modem (sounds like you are able to do this). Then add the router and use a direct connection to the router with a cable (this checks to make sure that everything is connecting and communicating correctly without adding the problems of troubleshooting a wireless connection). When the system is connecting through the router, remove the cable, and try to get the router and computer communicating wirelessly.
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