Airport problems when closing the iBook

When I close my iBook the airport turns off or loses its connection or something, disconnecting me from the Internet. Why is this? Is there a way I can change this occurrence? It is very frustrating. Can anyone help? I played around with the options of the AirPort for over an hour trying to prevent this from happening. Any ideas?

This happens to me when I am furthest from my AEBS and the signal is low. If I am closer, the wake/reconnect appears instantaneous. You might try MacStumbler to check your signal level where this is happening. I find that if it gets below 25 to 28, I might have reconnect-on-wake problems. These are only my observations. There may be other reasons for your problems.

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