What mode are you using? Access Point mode?

1. Select "Always dail-up" instead of "Dial on demand (with idle timeout timer)" 2. Also contact your ISP check for the internet line

Doesn't sound like a router issue. Better contact your ISP, let them check the internet line first.

They have little difference on hardware, once there are firmware upgrade, there will be firmware for both V2 and V3. No need to bother yourself with the firmware upgrade, V2 just use V2, V3 just use...

should included the part after the "@" sign.

channel 6 bandwidth HT 20MHz security WPA2-PSK mode: 11n only