Finally my C-Bus units have arrived after being stuck in customs for over 3 weeks I have done all my programing in Toolkit (Version 1.11.9) but now I am stuck trying to upload the program to the units. I have about 60 light circuits to control and I am using a 5500PCU interface, 5 12 channel relays, 10 Saturn DLT switches and 6 Saturn 4 button switches. On the paperwork that came with the 5500PCU it says that I need to install a USB PCI driver that is supposed to be available from the CIS downloads section of the website. I cant see anything there that looks like a PCI driver. There is no option in Toolkit to install the driver Last night when I plugged the 5500PCU in to the laptop a window came up "Installing Driver" and then after a while "Driver sucesfully installed" When I opened the Toolkit and click scan network I get an error message "PCI failed to reset. Unable to open the Network" I am using COM29(USB) - C Bus Wired PC Interface (5500PCU) I guess I am not doing the right things but I dont know where to go from here. I have only got 3 days left at home before I leave for another 28 day work stint and I would like to get at least our bedroom lighting functional on C Bus. What do I need to do?