How Do I Avoid Using Work Internet Connection

[racorby]

When I cradle my 6700 to charge and sync to Outlook, it uses my computer's lan connection to get to the internet vs. dialing up. How can I avoid this? I'd rather use the dialup connection. I have been unchecking the "allow USB connection" button, but then I can't sync. I am using ActivSync 4.2. Thanks.