I have a Belkin wireless router model F5D8231-4. The current firmware version is 5.01.05. So far, I have been unable to set a pre-shared key under wireless security. I'm setting the security mode as WPA-PSK(no server). Authentication is set to WPA2-PSK. Encryption technique is AES. I am supplying an 8-character key, composed of lowercase letters and numbers. when I press the submit button, the screen goes away for a few seconds before returning with all fields as I set them, except that the key field is empty. When I use a wireless device to test the connection, I am not prompted for a password! If I restart the router, the wireless security mode has been reset to "disabled."