Connect the Devices, one at a time, and then go to the Device Manager. RIGHT click on the entry for the device and then LEFT click "uninstall". DO NOT check the box to uninstall the drivers. After both have been uninstalled, physically disconnect them from the PC then restart the PC. After Windows finishes initializing, connect one device at a time and Windows should detect and install the device. Many times this fixes problems such as yours and if you are lucky it will fix yours.