My VMSpc had been working fine on my W7 laptop. I hadn't used it in a while and when I tried starting up today, I wasn't getting any communications. I had plugged the USB/serial cable into a different USB port which installed the drivers on Port 10. Since VMSpc was looking for port 3, I tried changing the driver to port 3 and went downhill from there. I've uninstalled and reinstalled the driver, downloaded most current version from the internet, but I keep getting an error 31, unable to install driver. Can you help?