If you are still having problems using the BITRONIX.exe software setup above, first UNINSTALL the Bitronics software. You can do this by right-clicking on the taskbar icon and answering YES to the prompt. Then, click on START, PROGRAMS, BELKIN BITRONICS SWITCH, then UNINSTALLSHIELD. After restarting your computer, you can install the older NT version of the software located in the second disk (part# P72736). During the installation, it will ask you the model number. Please select “Auto Switch 2-2 / 4-2”:
This version of the software is not fully automatic in printer selection. It requires the user to select ports each time through the taskbar icon.