I have a macbook 2.4Ghz 13.3" model with 2gb ram. It is running OS X 10.5.5 When I connect to a wireless network all is fine, the connection holds while it is being used and I have full signal. If I leave the connection for ten minutes and try and load another page safari tells me it is not connected even though Airport reports it is connected and has full signal. I am connection to a netgear DG834N router with WPA-PSK [TKIP] + WPA2-PSK [AES] encryption. The connection is fully stable as two PC's have been connected to it and active for weeks without any issues. If I turn off airport and then turn it back on the connection comes back and the same happens if I sleep the mac and turn it back on. I have made sure that airport it top of network connections and that the network I am connecting to is in the preferred list at the top. Any help or advice to solve this issue please?