All the info from Markk and Bigdog is right on the money but I will put my two cents in anyway [Linked Image from sundance-communications.com]. If the dongle is good (and they do go bad but not often) you will see the number of ports on the screen. Not finding the drivers can be a corrupted file or IRQ conflict. Any changes lately, such as a modem addition? A software reload may be your best bet, when saving files be sure to save the trans.txt file as well.