[Elecraft] K3S- USB problem

[RVZ]

Hi Guys,
 I've got a USB issue that I'm hoping you can help me resolve: My K3S had been communicating with my Windows 7 64-bit computer fine via a USB connection using virtual Comports 13 & 14.  I then removed the K3S from the computer in order to test a different radio.  Now I have the K3S connected to the computer again but  Comports 13 & 14 are no listed in Device Manager.  Only have Comport 5 is available and while it will do basic radio control of the K3S such as band changes it won't transfer audio to the computer which is needed for digital modes. Any ideas why I lost my virtual ports 13 & 14 and how to get them back?  Thought: if you believe I need to download a FTDI Driver again please advise which one I should use for a Windows 7 64-bit computer as multiple drivers are listed and I downloaded one and it didn't resolve my issue. Thanks & 73, Dick- K9OM