Troubleshooting Wireless Networking
When working with wireless networks, you may not be able to connect to the network for a number of reasons, such as the following:
  Interference   You may have trouble keeping a connection with your wireless network because of interference with other electronic equipment, such as cordless phones or microwaves. Try changing the channel on your wireless network. Wireless signals also have a tendency to “bounce” off of solid objects, so sometimes making small adjustments to furniture placement can help.
  Incorrect encryption   You may be trying to use the wrong encryption method or specifying the wrong encryption key. You will need to verify these settings before trying to connect.
  Incorrect channel ...

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