yes, I am using Nortel Contivitiy VPN Client.
I connect via the same router (all-in-one router)
I just solved the problem by myself
The VPN Client cannot work with Intel myWIFI technology/software.
Remove the myWifi (in the control panel, network connection, you should see one network interface instead of 3 interface, than that will be ok).
(If you are using ThinkPad Access Connection, you need to configure your wireless network before you remove myWiFI software)
I just got an error is .. once the screen saver start, the VPN connection will drop. I am trying to check the setting in the computer.