The problem is that the Graph Link USB driver has not been loaded on that computer before. You can obtain the driver from three different locations:
1. If you install the new version of the TI Connect software (from the TI web site or the TI Connectivity CD) the necessary USB driver will be installed. If you do not have the TI Connect software, you can download it free at: http://education.ti.com
2. Use the Logger Pro CD to install Logger Pro 3.1 (or higher) on your computer. The necessary USB driver will be installed.
3. Use the Vernier Graphical Analysis CD to install Graphical Analysis 3.0 though 3.4 on your computer. The necessary USB driver will be installed. (Version 3.8.4 does not install this driver nor will import from TI calculators.)
IMPORTANT: Be sure to unplug the USB Graph Link cable from you computer during any of the above installations.