Hi there,
If you connect your n85 with your computer using the data cable, it will prompt to choose the service to use on the mobile screen, then you can choose the pc mode or pc suite mode. It is only possible to connect, if nokia pc suite is installed in your system. Then your phone must have the required accesspoint of your service provider. it will connect flawlessly. Try and ask me bit by if you failed to connect.
Regards,