I have a fairly old macbook, 2007, but am running Snow Leopard. Recently it has taken to randomly disconnecting from our house's WiFi network. The other computers in the house connect fine, but my MacBook sometime just disconnects and it shows an exclamation point over the WiFi bars in the top right corner. It then asks for the password, even though I have it set to connect automatically, then it never reconnects. If I shut down the computer for a bit, it will connect and work for awhile. Anyone have any idea what's up? Thanks in advance.