To use USB Tether, please install the PdaNet Desktop client on the computer from http://junefabrics.com/android.

You can also download the installer directly from your phone with these steps:

1.Download PdaNet installer for 32-bit Windows, 64-bit Windows or Mac OS 10.5/10.6. This file will be saved to the memory card.
2.Connect your phone to the computer. On the phone press Menu->Notifications and select "USB connected". Now the memory card should be mounted as a USB drive on the computer.
3.Run the PdaNet installer under the "download" directory.