I am definitely not in a position to give professional technical suggestions... but I can honestly say that the SUPPORT and ADVICE I received from Apple people during my own thread about connectivity problems proved to be RIGHT ON
So when I followed their advice... and made sure my *ATV unit was set to DHCP (same as my Netgear router was using*).....also NOT USING the router's original "WEP" set-up, but changing it to
"WPA2Personal" ... then everything worked beautifully.... We successfully connected, previewed a few movies and watched a movie this past Saturday.... did not use it since then... but here on Tuesday morning, I just checked... everything is still working just fine!