You need to do following steps for adding a USB Controller
# Open the virtual machine settings editor and choose VM > Settings.
# Click Add to create the New Hardware Wizard.
# Click to Next button. The Hardware Type screen appears.
# Select USB Controller and then click Next.
# If you don't desire new USB devices to be automatically linked to the virtual machine, clear the check box.
# Click Finish to install the virtual USB controller
# Then click OK to save the configuration and close the virtual machine settings editor.